Finding the Fourth Proportional to 1,665.63, 2,498.04 and 787.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.63 : 2,498.04 = 787.59 : x
2. Step 2: Convert to fraction form
   1,665.63/2,498.04 = 787.59/x
3. Step 3: Cross multiply
   1,665.63x = 2,498.04 × 787.59
4. Step 4: Simplify right side
   1,665.63x = 1,967,431.32
5. Step 5: Solve for x
   x = 1,967,431.32/1,665.63
6. Step 6: Final answer
   x = 1,181.19