Finding the Fourth Proportional to 1,376.73, 1,900.02 and 787.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.73 : 1,900.02 = 787.31 : x
2. Step 2: Convert to fraction form
   1,376.73/1,900.02 = 787.31/x
3. Step 3: Cross multiply
   1,376.73x = 1,900.02 × 787.31
4. Step 4: Simplify right side
   1,376.73x = 1,495,904.75
5. Step 5: Solve for x
   x = 1,495,904.75/1,376.73
6. Step 6: Final answer
   x = 1,086.56