Finding the Fourth Proportional to 59,136.48, 81,588.96 and 42,143.40

Step by Step Solution

1. Step 1: Write the proportion equation
   59,136.48 : 81,588.96 = 42,143.40 : x
2. Step 2: Convert to fraction form
   59,136.48/81,588.96 = 42,143.40/x
3. Step 3: Cross multiply
   59,136.48x = 81,588.96 × 42,143.40
4. Step 4: Simplify right side
   59,136.48x = 3,438,436,176.86
5. Step 5: Solve for x
   x = 3,438,436,176.86/59,136.48
6. Step 6: Final answer
   x = 58,144.08