Finding the Fourth Proportional to 12,851.60, 17,731.04 and 7,547.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,851.60 : 17,731.04 = 7,547.72 : x
2. Step 2: Convert to fraction form
   12,851.60/17,731.04 = 7,547.72/x
3. Step 3: Cross multiply
   12,851.60x = 17,731.04 × 7,547.72
4. Step 4: Simplify right side
   12,851.60x = 133,828,925.23
5. Step 5: Solve for x
   x = 133,828,925.23/12,851.60
6. Step 6: Final answer
   x = 10,413.41