Finding the Fourth Proportional to 1,421.99, 1,961.12 and 924.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.99 : 1,961.12 = 924.45 : x
2. Step 2: Convert to fraction form
   1,421.99/1,961.12 = 924.45/x
3. Step 3: Cross multiply
   1,421.99x = 1,961.12 × 924.45
4. Step 4: Simplify right side
   1,421.99x = 1,812,959.70
5. Step 5: Solve for x
   x = 1,812,959.70/1,421.99
6. Step 6: Final answer
   x = 1,274.94