Finding the Fourth Proportional to 1,421.56, 1,962.42 and 924.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.56 : 1,962.42 = 924.76 : x
2. Step 2: Convert to fraction form
   1,421.56/1,962.42 = 924.76/x
3. Step 3: Cross multiply
   1,421.56x = 1,962.42 × 924.76
4. Step 4: Simplify right side
   1,421.56x = 1,814,767.52
5. Step 5: Solve for x
   x = 1,814,767.52/1,421.56
6. Step 6: Final answer
   x = 1,276.60