Finding the Fourth Proportional to 1,387.17, 1,914.13 and 797.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.17 : 1,914.13 = 797.89 : x
2. Step 2: Convert to fraction form
   1,387.17/1,914.13 = 797.89/x
3. Step 3: Cross multiply
   1,387.17x = 1,914.13 × 797.89
4. Step 4: Simplify right side
   1,387.17x = 1,527,263.19
5. Step 5: Solve for x
   x = 1,527,263.19/1,387.17
6. Step 6: Final answer
   x = 1,101.00