Finding the Fourth Proportional to 1,404.54, 1,938.06 and 880.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.54 : 1,938.06 = 880.74 : x
2. Step 2: Convert to fraction form
   1,404.54/1,938.06 = 880.74/x
3. Step 3: Cross multiply
   1,404.54x = 1,938.06 × 880.74
4. Step 4: Simplify right side
   1,404.54x = 1,706,926.96
5. Step 5: Solve for x
   x = 1,706,926.96/1,404.54
6. Step 6: Final answer
   x = 1,215.29