Finding the Fourth Proportional to 1,377.03, 1,899.83 and 787.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.03 : 1,899.83 = 787.15 : x
2. Step 2: Convert to fraction form
   1,377.03/1,899.83 = 787.15/x
3. Step 3: Cross multiply
   1,377.03x = 1,899.83 × 787.15
4. Step 4: Simplify right side
   1,377.03x = 1,495,451.18
5. Step 5: Solve for x
   x = 1,495,451.18/1,377.03
6. Step 6: Final answer
   x = 1,086.00