Finding the Fourth Proportional to 1,666.50, 2,499.02 and 886.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.50 : 2,499.02 = 886.31 : x
2. Step 2: Convert to fraction form
   1,666.50/2,499.02 = 886.31/x
3. Step 3: Cross multiply
   1,666.50x = 2,499.02 × 886.31
4. Step 4: Simplify right side
   1,666.50x = 2,214,901.98
5. Step 5: Solve for x
   x = 2,214,901.98/1,666.50
6. Step 6: Final answer
   x = 1,329.07