Finding the Fourth Proportional to 1,421.42, 1,961.98 and 924.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.42 : 1,961.98 = 924.12 : x
2. Step 2: Convert to fraction form
   1,421.42/1,961.98 = 924.12/x
3. Step 3: Cross multiply
   1,421.42x = 1,961.98 × 924.12
4. Step 4: Simplify right side
   1,421.42x = 1,813,102.65
5. Step 5: Solve for x
   x = 1,813,102.65/1,421.42
6. Step 6: Final answer
   x = 1,275.56