Finding the Fourth Proportional to 9,948.18, 13,729.32 and 5,472.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,948.18 : 13,729.32 = 5,472.78 : x
2. Step 2: Convert to fraction form
   9,948.18/13,729.32 = 5,472.78/x
3. Step 3: Cross multiply
   9,948.18x = 13,729.32 × 5,472.78
4. Step 4: Simplify right side
   9,948.18x = 75,137,547.91
5. Step 5: Solve for x
   x = 75,137,547.91/9,948.18
6. Step 6: Final answer
   x = 7,552.89