Finding the Fourth Proportional to 71,693.58, 98,935.86 and 39,861.81

Step by Step Solution

1. Step 1: Write the proportion equation
   71,693.58 : 98,935.86 = 39,861.81 : x
2. Step 2: Convert to fraction form
   71,693.58/98,935.86 = 39,861.81/x
3. Step 3: Cross multiply
   71,693.58x = 98,935.86 × 39,861.81
4. Step 4: Simplify right side
   71,693.58x = 3,943,762,453.51
5. Step 5: Solve for x
   x = 3,943,762,453.51/71,693.58
6. Step 6: Final answer
   x = 55,008.59