Finding the Fourth Proportional to 14,088.72, 21,138.78 and 5,326.14

Step by Step Solution

1. Step 1: Write the proportion equation
   14,088.72 : 21,138.78 = 5,326.14 : x
2. Step 2: Convert to fraction form
   14,088.72/21,138.78 = 5,326.14/x
3. Step 3: Cross multiply
   14,088.72x = 21,138.78 × 5,326.14
4. Step 4: Simplify right side
   14,088.72x = 112,588,101.71
5. Step 5: Solve for x
   x = 112,588,101.71/14,088.72
6. Step 6: Final answer
   x = 7,991.36