Finding the Fourth Proportional to 88,612.56, 122,216.22 and 56,784.42

Step by Step Solution

1. Step 1: Write the proportion equation
   88,612.56 : 122,216.22 = 56,784.42 : x
2. Step 2: Convert to fraction form
   88,612.56/122,216.22 = 56,784.42/x
3. Step 3: Cross multiply
   88,612.56x = 122,216.22 × 56,784.42
4. Step 4: Simplify right side
   88,612.56x = 6,939,977,167.29
5. Step 5: Solve for x
   x = 6,939,977,167.29/88,612.56
6. Step 6: Final answer
   x = 78,318.21