Finding the Fourth Proportional to 1,666.38, 2,496.32 and 1,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.38 : 2,496.32 = 1,087.50 : x
2. Step 2: Convert to fraction form
   1,666.38/2,496.32 = 1,087.50/x
3. Step 3: Cross multiply
   1,666.38x = 2,496.32 × 1,087.50
4. Step 4: Simplify right side
   1,666.38x = 2,714,748
5. Step 5: Solve for x
   x = 2,714,748/1,666.38
6. Step 6: Final answer
   x = 1,629.13