Finding the Fourth Proportional to 11,613.61, 16,018.63 and 7,139.83

Step by Step Solution

1. Step 1: Write the proportion equation
   11,613.61 : 16,018.63 = 7,139.83 : x
2. Step 2: Convert to fraction form
   11,613.61/16,018.63 = 7,139.83/x
3. Step 3: Cross multiply
   11,613.61x = 16,018.63 × 7,139.83
4. Step 4: Simplify right side
   11,613.61x = 114,370,267.17
5. Step 5: Solve for x
   x = 114,370,267.17/11,613.61
6. Step 6: Final answer
   x = 9,847.95