Finding the Fourth Proportional to 1,416.72, 1,955.10 and 787.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,416.72 : 1,955.10 = 787.31 : x
2. Step 2: Convert to fraction form
   1,416.72/1,955.10 = 787.31/x
3. Step 3: Cross multiply
   1,416.72x = 1,955.10 × 787.31
4. Step 4: Simplify right side
   1,416.72x = 1,539,256.07
5. Step 5: Solve for x
   x = 1,539,256.07/1,416.72
6. Step 6: Final answer
   x = 1,086.49