Finding the Fourth Proportional to 3,437.43, 5,155.54 and 972.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,437.43 : 5,155.54 = 972.20 : x
2. Step 2: Convert to fraction form
   3,437.43/5,155.54 = 972.20/x
3. Step 3: Cross multiply
   3,437.43x = 5,155.54 × 972.20
4. Step 4: Simplify right side
   3,437.43x = 5,012,187.78
5. Step 5: Solve for x
   x = 5,012,187.78/3,437.43
6. Step 6: Final answer
   x = 1,458.12