Finding the Fourth Proportional to 1,417.07, 1,955.68 and 787.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.07 : 1,955.68 = 787.72 : x
2. Step 2: Convert to fraction form
   1,417.07/1,955.68 = 787.72/x
3. Step 3: Cross multiply
   1,417.07x = 1,955.68 × 787.72
4. Step 4: Simplify right side
   1,417.07x = 1,540,535.23
5. Step 5: Solve for x
   x = 1,540,535.23/1,417.07
6. Step 6: Final answer
   x = 1,087.12