Finding the Fourth Proportional to 9,117.18, 12,581.86 and 5,138.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,117.18 : 12,581.86 = 5,138.36 : x
2. Step 2: Convert to fraction form
   9,117.18/12,581.86 = 5,138.36/x
3. Step 3: Cross multiply
   9,117.18x = 12,581.86 × 5,138.36
4. Step 4: Simplify right side
   9,117.18x = 64,650,126.15
5. Step 5: Solve for x
   x = 64,650,126.15/9,117.18
6. Step 6: Final answer
   x = 7,091.02