Finding the Fourth Proportional to 1,572.56, 2,357.61 and 913.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,572.56 : 2,357.61 = 913.42 : x
2. Step 2: Convert to fraction form
   1,572.56/2,357.61 = 913.42/x
3. Step 3: Cross multiply
   1,572.56x = 2,357.61 × 913.42
4. Step 4: Simplify right side
   1,572.56x = 2,153,488.13
5. Step 5: Solve for x
   x = 2,153,488.13/1,572.56
6. Step 6: Final answer
   x = 1,369.42