Finding the Fourth Proportional to 61,022.86, 84,168.12 and 56,003.28

Step by Step Solution

1. Step 1: Write the proportion equation
   61,022.86 : 84,168.12 = 56,003.28 : x
2. Step 2: Convert to fraction form
   61,022.86/84,168.12 = 56,003.28/x
3. Step 3: Cross multiply
   61,022.86x = 84,168.12 × 56,003.28
4. Step 4: Simplify right side
   61,022.86x = 4,713,690,791.43
5. Step 5: Solve for x
   x = 4,713,690,791.43/61,022.86
6. Step 6: Final answer
   x = 77,244.67