Finding the Fourth Proportional to 52,160.31, 71,980.72 and 28,286.57

Step by Step Solution

1. Step 1: Write the proportion equation
   52,160.31 : 71,980.72 = 28,286.57 : x
2. Step 2: Convert to fraction form
   52,160.31/71,980.72 = 28,286.57/x
3. Step 3: Cross multiply
   52,160.31x = 71,980.72 × 28,286.57
4. Step 4: Simplify right side
   52,160.31x = 2,036,087,784.17
5. Step 5: Solve for x
   x = 2,036,087,784.17/52,160.31
6. Step 6: Final answer
   x = 39,035.19