Finding the Fourth Proportional to 1,404.72, 1,938.48 and 790.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.72 : 1,938.48 = 790.76 : x
2. Step 2: Convert to fraction form
   1,404.72/1,938.48 = 790.76/x
3. Step 3: Cross multiply
   1,404.72x = 1,938.48 × 790.76
4. Step 4: Simplify right side
   1,404.72x = 1,532,872.44
5. Step 5: Solve for x
   x = 1,532,872.44/1,404.72
6. Step 6: Final answer
   x = 1,091.23