Finding the Fourth Proportional to 298,973,114.10, 448,459,671.15 and 137,729,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   298,973,114.10 : 448,459,671.15 = 137,729,978.10 : x
2. Step 2: Convert to fraction form
   298,973,114.10/448,459,671.15 = 137,729,978.10/x
3. Step 3: Cross multiply
   298,973,114.10x = 448,459,671.15 × 137,729,978.10
4. Step 4: Simplify right side
   298,973,114.10x = 61,766,340,686,222,696
5. Step 5: Solve for x
   x = 61,766,340,686,222,696/298,973,114.10
6. Step 6: Final answer
   x = 206,594,967.15