Finding the Fourth Proportional to 10,388.60, 14,336.18 and 5,672.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,388.60 : 14,336.18 = 5,672.88 : x
2. Step 2: Convert to fraction form
   10,388.60/14,336.18 = 5,672.88/x
3. Step 3: Cross multiply
   10,388.60x = 14,336.18 × 5,672.88
4. Step 4: Simplify right side
   10,388.60x = 81,327,428.80
5. Step 5: Solve for x
   x = 81,327,428.80/10,388.60
6. Step 6: Final answer
   x = 7,828.53