Finding the Fourth Proportional to 13,068.02, 18,032.80 and 7,689.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,068.02 : 18,032.80 = 7,689.60 : x
2. Step 2: Convert to fraction form
   13,068.02/18,032.80 = 7,689.60/x
3. Step 3: Cross multiply
   13,068.02x = 18,032.80 × 7,689.60
4. Step 4: Simplify right side
   13,068.02x = 138,665,018.88
5. Step 5: Solve for x
   x = 138,665,018.88/13,068.02
6. Step 6: Final answer
   x = 10,611.02