Finding the Fourth Proportional to 1,561.48, 2,155.38 and 972.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.48 : 2,155.38 = 972.52 : x
2. Step 2: Convert to fraction form
   1,561.48/2,155.38 = 972.52/x
3. Step 3: Cross multiply
   1,561.48x = 2,155.38 × 972.52
4. Step 4: Simplify right side
   1,561.48x = 2,096,150.16
5. Step 5: Solve for x
   x = 2,096,150.16/1,561.48
6. Step 6: Final answer
   x = 1,342.41