Finding the Fourth Proportional to 10,618.71, 15,835.35 and 9,308.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,618.71 : 15,835.35 = 9,308.54 : x
2. Step 2: Convert to fraction form
   10,618.71/15,835.35 = 9,308.54/x
3. Step 3: Cross multiply
   10,618.71x = 15,835.35 × 9,308.54
4. Step 4: Simplify right side
   10,618.71x = 147,403,909.71
5. Step 5: Solve for x
   x = 147,403,909.71/10,618.71
6. Step 6: Final answer
   x = 13,881.53