Finding the Fourth Proportional to 55,766.72, 83,646.96 and 40,789.20

Step by Step Solution

1. Step 1: Write the proportion equation
   55,766.72 : 83,646.96 = 40,789.20 : x
2. Step 2: Convert to fraction form
   55,766.72/83,646.96 = 40,789.20/x
3. Step 3: Cross multiply
   55,766.72x = 83,646.96 × 40,789.20
4. Step 4: Simplify right side
   55,766.72x = 3,411,892,580.83
5. Step 5: Solve for x
   x = 3,411,892,580.83/55,766.72
6. Step 6: Final answer
   x = 61,181.52