Finding the Fourth Proportional to 89,447.50, 123,463.47 and 59,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,447.50 : 123,463.47 = 59,639.50 : x
2. Step 2: Convert to fraction form
   89,447.50/123,463.47 = 59,639.50/x
3. Step 3: Cross multiply
   89,447.50x = 123,463.47 × 59,639.50
4. Step 4: Simplify right side
   89,447.50x = 7,363,299,619.07
5. Step 5: Solve for x
   x = 7,363,299,619.07/89,447.50
6. Step 6: Final answer
   x = 82,319.79