Finding the Fourth Proportional to 51,152.31, 70,592.37 and 28,491.30

Step by Step Solution

1. Step 1: Write the proportion equation
   51,152.31 : 70,592.37 = 28,491.30 : x
2. Step 2: Convert to fraction form
   51,152.31/70,592.37 = 28,491.30/x
3. Step 3: Cross multiply
   51,152.31x = 70,592.37 × 28,491.30
4. Step 4: Simplify right side
   51,152.31x = 2,011,268,391.38
5. Step 5: Solve for x
   x = 2,011,268,391.38/51,152.31
6. Step 6: Final answer
   x = 39,319.21