Finding the Fourth Proportional to 13,061.62, 18,027.30 and 7,758.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.62 : 18,027.30 = 7,758.28 : x
2. Step 2: Convert to fraction form
   13,061.62/18,027.30 = 7,758.28/x
3. Step 3: Cross multiply
   13,061.62x = 18,027.30 × 7,758.28
4. Step 4: Simplify right side
   13,061.62x = 139,860,841.04
5. Step 5: Solve for x
   x = 139,860,841.04/13,061.62
6. Step 6: Final answer
   x = 10,707.77