Finding the Fourth Proportional to 1,499.74, 2,238.50 and 1,407.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.74 : 2,238.50 = 1,407.40 : x
2. Step 2: Convert to fraction form
   1,499.74/2,238.50 = 1,407.40/x
3. Step 3: Cross multiply
   1,499.74x = 2,238.50 × 1,407.40
4. Step 4: Simplify right side
   1,499.74x = 3,150,454.91
5. Step 5: Solve for x
   x = 3,150,454.91/1,499.74
6. Step 6: Final answer
   x = 2,100.67