Finding the Fourth Proportional to 9,042.32, 12,478.15 and 5,009.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,042.32 : 12,478.15 = 5,009.28 : x
2. Step 2: Convert to fraction form
   9,042.32/12,478.15 = 5,009.28/x
3. Step 3: Cross multiply
   9,042.32x = 12,478.15 × 5,009.28
4. Step 4: Simplify right side
   9,042.32x = 62,506,547.23
5. Step 5: Solve for x
   x = 62,506,547.23/9,042.32
6. Step 6: Final answer
   x = 6,912.67