Finding the Fourth Proportional to 1,376.67, 1,899.63 and 787.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.67 : 1,899.63 = 787.08 : x
2. Step 2: Convert to fraction form
   1,376.67/1,899.63 = 787.08/x
3. Step 3: Cross multiply
   1,376.67x = 1,899.63 × 787.08
4. Step 4: Simplify right side
   1,376.67x = 1,495,160.78
5. Step 5: Solve for x
   x = 1,495,160.78/1,376.67
6. Step 6: Final answer
   x = 1,086.07