Finding the Fourth Proportional to 10,388.16, 14,335.66 and 5,672.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,388.16 : 14,335.66 = 5,672.45 : x
2. Step 2: Convert to fraction form
   10,388.16/14,335.66 = 5,672.45/x
3. Step 3: Cross multiply
   10,388.16x = 14,335.66 × 5,672.45
4. Step 4: Simplify right side
   10,388.16x = 81,318,314.57
5. Step 5: Solve for x
   x = 81,318,314.57/10,388.16
6. Step 6: Final answer
   x = 7,827.98