Finding the Fourth Proportional to 1,387.34, 1,914.71 and 797.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.34 : 1,914.71 = 797.76 : x
2. Step 2: Convert to fraction form
   1,387.34/1,914.71 = 797.76/x
3. Step 3: Cross multiply
   1,387.34x = 1,914.71 × 797.76
4. Step 4: Simplify right side
   1,387.34x = 1,527,475.06
5. Step 5: Solve for x
   x = 1,527,475.06/1,387.34
6. Step 6: Final answer
   x = 1,101.01