Finding the Fourth Proportional to 10,865.90, 15,007.28 and 7,322.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,865.90 : 15,007.28 = 7,322.96 : x
2. Step 2: Convert to fraction form
   10,865.90/15,007.28 = 7,322.96/x
3. Step 3: Cross multiply
   10,865.90x = 15,007.28 × 7,322.96
4. Step 4: Simplify right side
   10,865.90x = 109,897,599.50
5. Step 5: Solve for x
   x = 109,897,599.50/10,865.90
6. Step 6: Final answer
   x = 10,113.99