Finding the Fourth Proportional to 1,112,978,137.33, 1,669,790,320.21 and 448,649,316.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112,978,137.33 : 1,669,790,320.21 = 448,649,316.10 : x
2. Step 2: Convert to fraction form
   1,112,978,137.33/1,669,790,320.21 = 448,649,316.10/x
3. Step 3: Cross multiply
   1,112,978,137.33x = 1,669,790,320.21 × 448,649,316.10
4. Step 4: Simplify right side
   1,112,978,137.33x = 749,150,285,185,841,152
5. Step 5: Solve for x
   x = 749,150,285,185,841,152/1,112,978,137.33
6. Step 6: Final answer
   x = 673,104,223.76