Finding the Fourth Proportional to 1,421.34, 1,962.21 and 924.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.34 : 1,962.21 = 924.27 : x
2. Step 2: Convert to fraction form
   1,421.34/1,962.21 = 924.27/x
3. Step 3: Cross multiply
   1,421.34x = 1,962.21 × 924.27
4. Step 4: Simplify right side
   1,421.34x = 1,813,611.84
5. Step 5: Solve for x
   x = 1,813,611.84/1,421.34
6. Step 6: Final answer
   x = 1,275.99