Finding the Fourth Proportional to 1,376.73, 1,899.88 and 787.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.73 : 1,899.88 = 787.37 : x
2. Step 2: Convert to fraction form
   1,376.73/1,899.88 = 787.37/x
3. Step 3: Cross multiply
   1,376.73x = 1,899.88 × 787.37
4. Step 4: Simplify right side
   1,376.73x = 1,495,897.05
5. Step 5: Solve for x
   x = 1,495,897.05/1,376.73
6. Step 6: Final answer
   x = 1,086.56