Finding the Fourth Proportional to 1,666.24, 2,499.38 and 788.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.24 : 2,499.38 = 788.46 : x
2. Step 2: Convert to fraction form
   1,666.24/2,499.38 = 788.46/x
3. Step 3: Cross multiply
   1,666.24x = 2,499.38 × 788.46
4. Step 4: Simplify right side
   1,666.24x = 1,970,661.15
5. Step 5: Solve for x
   x = 1,970,661.15/1,666.24
6. Step 6: Final answer
   x = 1,182.70