Finding the Fourth Proportional to 59,780.79, 89,548.16 and 43,174.17

Step by Step Solution

1. Step 1: Write the proportion equation
   59,780.79 : 89,548.16 = 43,174.17 : x
2. Step 2: Convert to fraction form
   59,780.79/89,548.16 = 43,174.17/x
3. Step 3: Cross multiply
   59,780.79x = 89,548.16 × 43,174.17
4. Step 4: Simplify right side
   59,780.79x = 3,866,167,267.16
5. Step 5: Solve for x
   x = 3,866,167,267.16/59,780.79
6. Step 6: Final answer
   x = 64,672.40