Finding the Fourth Proportional to 13,066.49, 18,025.80 and 7,758.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.49 : 18,025.80 = 7,758.29 : x
2. Step 2: Convert to fraction form
   13,066.49/18,025.80 = 7,758.29/x
3. Step 3: Cross multiply
   13,066.49x = 18,025.80 × 7,758.29
4. Step 4: Simplify right side
   13,066.49x = 139,849,383.88
5. Step 5: Solve for x
   x = 139,849,383.88/13,066.49
6. Step 6: Final answer
   x = 10,702.90