Finding the Fourth Proportional to 93,399.50, 128,891.31 and 59,865.50

Step by Step Solution

1. Step 1: Write the proportion equation
   93,399.50 : 128,891.31 = 59,865.50 : x
2. Step 2: Convert to fraction form
   93,399.50/128,891.31 = 59,865.50/x
3. Step 3: Cross multiply
   93,399.50x = 128,891.31 × 59,865.50
4. Step 4: Simplify right side
   93,399.50x = 7,716,142,718.81
5. Step 5: Solve for x
   x = 7,716,142,718.81/93,399.50
6. Step 6: Final answer
   x = 82,614.39