Finding the Fourth Proportional to 1,422.56, 2,134.15 and 498.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.56 : 2,134.15 = 498.86 : x
2. Step 2: Convert to fraction form
   1,422.56/2,134.15 = 498.86/x
3. Step 3: Cross multiply
   1,422.56x = 2,134.15 × 498.86
4. Step 4: Simplify right side
   1,422.56x = 1,064,638.15
5. Step 5: Solve for x
   x = 1,064,638.15/1,422.56
6. Step 6: Final answer
   x = 748.39