Finding the Fourth Proportional to 1,442.34, 1,991.12 and 1,088.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.34 : 1,991.12 = 1,088.42 : x
2. Step 2: Convert to fraction form
   1,442.34/1,991.12 = 1,088.42/x
3. Step 3: Cross multiply
   1,442.34x = 1,991.12 × 1,088.42
4. Step 4: Simplify right side
   1,442.34x = 2,167,159.43
5. Step 5: Solve for x
   x = 2,167,159.43/1,442.34
6. Step 6: Final answer
   x = 1,502.53