Finding the Fourth Proportional to 10,297.40, 14,209.15 and 7,312.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,297.40 : 14,209.15 = 7,312.15 : x
2. Step 2: Convert to fraction form
   10,297.40/14,209.15 = 7,312.15/x
3. Step 3: Cross multiply
   10,297.40x = 14,209.15 × 7,312.15
4. Step 4: Simplify right side
   10,297.40x = 103,899,436.17
5. Step 5: Solve for x
   x = 103,899,436.17/10,297.40
6. Step 6: Final answer
   x = 10,089.87