Finding the Fourth Proportional to 51,665.16, 71,300.29 and 28,695.07

Step by Step Solution

1. Step 1: Write the proportion equation
   51,665.16 : 71,300.29 = 28,695.07 : x
2. Step 2: Convert to fraction form
   51,665.16/71,300.29 = 28,695.07/x
3. Step 3: Cross multiply
   51,665.16x = 71,300.29 × 28,695.07
4. Step 4: Simplify right side
   51,665.16x = 2,045,966,812.57
5. Step 5: Solve for x
   x = 2,045,966,812.57/51,665.16
6. Step 6: Final answer
   x = 39,600.51