Finding the Fourth Proportional to 9,248.32, 12,763.56 and 5,057.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,248.32 : 12,763.56 = 5,057.20 : x
2. Step 2: Convert to fraction form
   9,248.32/12,763.56 = 5,057.20/x
3. Step 3: Cross multiply
   9,248.32x = 12,763.56 × 5,057.20
4. Step 4: Simplify right side
   9,248.32x = 64,547,875.63
5. Step 5: Solve for x
   x = 64,547,875.63/9,248.32
6. Step 6: Final answer
   x = 6,979.42