Finding the Fourth Proportional to 1,691.56, 2,535.76 and 868.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,691.56 : 2,535.76 = 868.01 : x
2. Step 2: Convert to fraction form
   1,691.56/2,535.76 = 868.01/x
3. Step 3: Cross multiply
   1,691.56x = 2,535.76 × 868.01
4. Step 4: Simplify right side
   1,691.56x = 2,201,065.04
5. Step 5: Solve for x
   x = 2,201,065.04/1,691.56
6. Step 6: Final answer
   x = 1,301.20