Finding the Fourth Proportional to 42,000, 57,960.18 and 23,136.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,000 : 57,960.18 = 23,136.72 : x
2. Step 2: Convert to fraction form
   42,000/57,960.18 = 23,136.72/x
3. Step 3: Cross multiply
   42,000x = 57,960.18 × 23,136.72
4. Step 4: Simplify right side
   42,000x = 1,341,008,455.81
5. Step 5: Solve for x
   x = 1,341,008,455.81/42,000
6. Step 6: Final answer
   x = 31,928.77