Finding the Fourth Proportional to 1,404.42, 2,104.29 and 992.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.42 : 2,104.29 = 992.72 : x
2. Step 2: Convert to fraction form
   1,404.42/2,104.29 = 992.72/x
3. Step 3: Cross multiply
   1,404.42x = 2,104.29 × 992.72
4. Step 4: Simplify right side
   1,404.42x = 2,088,960.25
5. Step 5: Solve for x
   x = 2,088,960.25/1,404.42
6. Step 6: Final answer
   x = 1,487.42