Finding the Fourth Proportional to 1,376.60, 1,899.50 and 787.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.60 : 1,899.50 = 787.01 : x
2. Step 2: Convert to fraction form
   1,376.60/1,899.50 = 787.01/x
3. Step 3: Cross multiply
   1,376.60x = 1,899.50 × 787.01
4. Step 4: Simplify right side
   1,376.60x = 1,494,912.06
5. Step 5: Solve for x
   x = 1,494,912.06/1,376.60
6. Step 6: Final answer
   x = 1,085.95