Finding the Fourth Proportional to 2,088.32, 3,128.88 and 992.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.32 : 3,128.88 = 992.24 : x
2. Step 2: Convert to fraction form
   2,088.32/3,128.88 = 992.24/x
3. Step 3: Cross multiply
   2,088.32x = 3,128.88 × 992.24
4. Step 4: Simplify right side
   2,088.32x = 3,104,599.89
5. Step 5: Solve for x
   x = 3,104,599.89/2,088.32
6. Step 6: Final answer
   x = 1,486.65