Finding the Fourth Proportional to 1,121,100.16, 1,682,240.72 and 648,117.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,121,100.16 : 1,682,240.72 = 648,117.76 : x
2. Step 2: Convert to fraction form
   1,121,100.16/1,682,240.72 = 648,117.76/x
3. Step 3: Cross multiply
   1,121,100.16x = 1,682,240.72 × 648,117.76
4. Step 4: Simplify right side
   1,121,100.16x = 1,090,290,087,227.19
5. Step 5: Solve for x
   x = 1,090,290,087,227.19/1,121,100.16
6. Step 6: Final answer
   x = 972,518.00