Finding the Fourth Proportional to 66,682.38, 91,978.32 and 42,771.18

Step by Step Solution

1. Step 1: Write the proportion equation
   66,682.38 : 91,978.32 = 42,771.18 : x
2. Step 2: Convert to fraction form
   66,682.38/91,978.32 = 42,771.18/x
3. Step 3: Cross multiply
   66,682.38x = 91,978.32 × 42,771.18
4. Step 4: Simplify right side
   66,682.38x = 3,934,021,280.82
5. Step 5: Solve for x
   x = 3,934,021,280.82/66,682.38
6. Step 6: Final answer
   x = 58,996.41