Finding the Fourth Proportional to 66,059.48, 91,237.79 and 43,499.31

Step by Step Solution

1. Step 1: Write the proportion equation
   66,059.48 : 91,237.79 = 43,499.31 : x
2. Step 2: Convert to fraction form
   66,059.48/91,237.79 = 43,499.31/x
3. Step 3: Cross multiply
   66,059.48x = 91,237.79 × 43,499.31
4. Step 4: Simplify right side
   66,059.48x = 3,968,780,693.43
5. Step 5: Solve for x
   x = 3,968,780,693.43/66,059.48
6. Step 6: Final answer
   x = 60,078.90