Finding the Fourth Proportional to 13,116.30, 18,100.50 and 7,147.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,116.30 : 18,100.50 = 7,147.96 : x
2. Step 2: Convert to fraction form
   13,116.30/18,100.50 = 7,147.96/x
3. Step 3: Cross multiply
   13,116.30x = 18,100.50 × 7,147.96
4. Step 4: Simplify right side
   13,116.30x = 129,381,649.98
5. Step 5: Solve for x
   x = 129,381,649.98/13,116.30
6. Step 6: Final answer
   x = 9,864.19