Finding the Fourth Proportional to 89,428.50, 123,437.25 and 59,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,428.50 : 123,437.25 = 59,620.50 : x
2. Step 2: Convert to fraction form
   89,428.50/123,437.25 = 59,620.50/x
3. Step 3: Cross multiply
   89,428.50x = 123,437.25 × 59,620.50
4. Step 4: Simplify right side
   89,428.50x = 7,359,390,563.63
5. Step 5: Solve for x
   x = 7,359,390,563.63/89,428.50
6. Step 6: Final answer
   x = 82,293.57