Finding the Fourth Proportional to 1,666.19, 2,497.18 and 788.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.19 : 2,497.18 = 788.69 : x
2. Step 2: Convert to fraction form
   1,666.19/2,497.18 = 788.69/x
3. Step 3: Cross multiply
   1,666.19x = 2,497.18 × 788.69
4. Step 4: Simplify right side
   1,666.19x = 1,969,500.89
5. Step 5: Solve for x
   x = 1,969,500.89/1,666.19
6. Step 6: Final answer
   x = 1,182.04