Finding the Fourth Proportional to 1,422.19, 1,962.93 and 898.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.19 : 1,962.93 = 898.12 : x
2. Step 2: Convert to fraction form
   1,422.19/1,962.93 = 898.12/x
3. Step 3: Cross multiply
   1,422.19x = 1,962.93 × 898.12
4. Step 4: Simplify right side
   1,422.19x = 1,762,946.69
5. Step 5: Solve for x
   x = 1,762,946.69/1,422.19
6. Step 6: Final answer
   x = 1,239.60