Finding the Fourth Proportional to 10,928.32, 16,402.24 and 5,088.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.32 : 16,402.24 = 5,088.80 : x
2. Step 2: Convert to fraction form
   10,928.32/16,402.24 = 5,088.80/x
3. Step 3: Cross multiply
   10,928.32x = 16,402.24 × 5,088.80
4. Step 4: Simplify right side
   10,928.32x = 83,467,718.91
5. Step 5: Solve for x
   x = 83,467,718.91/10,928.32
6. Step 6: Final answer
   x = 7,637.74