Finding the Fourth Proportional to 1,437.42, 1,979.72 and 1,240.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.42 : 1,979.72 = 1,240.86 : x
2. Step 2: Convert to fraction form
   1,437.42/1,979.72 = 1,240.86/x
3. Step 3: Cross multiply
   1,437.42x = 1,979.72 × 1,240.86
4. Step 4: Simplify right side
   1,437.42x = 2,456,555.36
5. Step 5: Solve for x
   x = 2,456,555.36/1,437.42
6. Step 6: Final answer
   x = 1,709.00