Finding the Fourth Proportional to 861,168.87, 1,290,572.33 and 545,061.51

Step by Step Solution

1. Step 1: Write the proportion equation
   861,168.87 : 1,290,572.33 = 545,061.51 : x
2. Step 2: Convert to fraction form
   861,168.87/1,290,572.33 = 545,061.51/x
3. Step 3: Cross multiply
   861,168.87x = 1,290,572.33 × 545,061.51
4. Step 4: Simplify right side
   861,168.87x = 703,441,300,228.71
5. Step 5: Solve for x
   x = 703,441,300,228.71/861,168.87
6. Step 6: Final answer
   x = 816,844.78