Finding the Fourth Proportional to 1,131.65, 1,560.87 and 974.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.65 : 1,560.87 = 974.01 : x
2. Step 2: Convert to fraction form
   1,131.65/1,560.87 = 974.01/x
3. Step 3: Cross multiply
   1,131.65x = 1,560.87 × 974.01
4. Step 4: Simplify right side
   1,131.65x = 1,520,290.31
5. Step 5: Solve for x
   x = 1,520,290.31/1,131.65
6. Step 6: Final answer
   x = 1,343.43