Finding the Fourth Proportional to 35,148.28, 52,719.72 and 12,957.52

Step by Step Solution

1. Step 1: Write the proportion equation
   35,148.28 : 52,719.72 = 12,957.52 : x
2. Step 2: Convert to fraction form
   35,148.28/52,719.72 = 12,957.52/x
3. Step 3: Cross multiply
   35,148.28x = 52,719.72 × 12,957.52
4. Step 4: Simplify right side
   35,148.28x = 683,116,826.29
5. Step 5: Solve for x
   x = 683,116,826.29/35,148.28
6. Step 6: Final answer
   x = 19,435.28