Finding the Fourth Proportional to 1,491.76, 2,238.18 and 670.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.76 : 2,238.18 = 670.24 : x
2. Step 2: Convert to fraction form
   1,491.76/2,238.18 = 670.24/x
3. Step 3: Cross multiply
   1,491.76x = 2,238.18 × 670.24
4. Step 4: Simplify right side
   1,491.76x = 1,500,117.76
5. Step 5: Solve for x
   x = 1,500,117.76/1,491.76
6. Step 6: Final answer
   x = 1,005.60