Finding the Fourth Proportional to 1,376.73, 1,899.72 and 787.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.73 : 1,899.72 = 787.32 : x
2. Step 2: Convert to fraction form
   1,376.73/1,899.72 = 787.32/x
3. Step 3: Cross multiply
   1,376.73x = 1,899.72 × 787.32
4. Step 4: Simplify right side
   1,376.73x = 1,495,687.55
5. Step 5: Solve for x
   x = 1,495,687.55/1,376.73
6. Step 6: Final answer
   x = 1,086.41