Finding the Fourth Proportional to 1,197,978.87, 1,653,218.91 and 654,118.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,197,978.87 : 1,653,218.91 = 654,118.47 : x
2. Step 2: Convert to fraction form
   1,197,978.87/1,653,218.91 = 654,118.47/x
3. Step 3: Cross multiply
   1,197,978.87x = 1,653,218.91 × 654,118.47
4. Step 4: Simplify right side
   1,197,978.87x = 1,081,401,023,984.27
5. Step 5: Solve for x
   x = 1,081,401,023,984.27/1,197,978.87
6. Step 6: Final answer
   x = 902,687.89