Finding the Fourth Proportional to 787,053.47, 1,086,128.71 and 447,521.69

Step by Step Solution

1. Step 1: Write the proportion equation
   787,053.47 : 1,086,128.71 = 447,521.69 : x
2. Step 2: Convert to fraction form
   787,053.47/1,086,128.71 = 447,521.69/x
3. Step 3: Cross multiply
   787,053.47x = 1,086,128.71 × 447,521.69
4. Step 4: Simplify right side
   787,053.47x = 486,066,155,856.72
5. Step 5: Solve for x
   x = 486,066,155,856.72/787,053.47
6. Step 6: Final answer
   x = 617,577.04