Finding the Fourth Proportional to 9,312.78, 12,851.88 and 5,537.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,312.78 : 12,851.88 = 5,537.98 : x
2. Step 2: Convert to fraction form
   9,312.78/12,851.88 = 5,537.98/x
3. Step 3: Cross multiply
   9,312.78x = 12,851.88 × 5,537.98
4. Step 4: Simplify right side
   9,312.78x = 71,173,454.40
5. Step 5: Solve for x
   x = 71,173,454.40/9,312.78
6. Step 6: Final answer
   x = 7,642.56