Finding the Fourth Proportional to 1,574.96, 2,171.88 and 1,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,574.96 : 2,171.88 = 1,242.72 : x
2. Step 2: Convert to fraction form
   1,574.96/2,171.88 = 1,242.72/x
3. Step 3: Cross multiply
   1,574.96x = 2,171.88 × 1,242.72
4. Step 4: Simplify right side
   1,574.96x = 2,699,038.71
5. Step 5: Solve for x
   x = 2,699,038.71/1,574.96
6. Step 6: Final answer
   x = 1,713.72