Finding the Fourth Proportional to 9,521.61, 13,139.88 and 5,545.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,521.61 : 13,139.88 = 5,545.02 : x
2. Step 2: Convert to fraction form
   9,521.61/13,139.88 = 5,545.02/x
3. Step 3: Cross multiply
   9,521.61x = 13,139.88 × 5,545.02
4. Step 4: Simplify right side
   9,521.61x = 72,860,897.40
5. Step 5: Solve for x
   x = 72,860,897.40/9,521.61
6. Step 6: Final answer
   x = 7,652.16