Finding the Fourth Proportional to 1,493.72, 2,061.25 and 830.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,493.72 : 2,061.25 = 830.55 : x
2. Step 2: Convert to fraction form
   1,493.72/2,061.25 = 830.55/x
3. Step 3: Cross multiply
   1,493.72x = 2,061.25 × 830.55
4. Step 4: Simplify right side
   1,493.72x = 1,711,969.11
5. Step 5: Solve for x
   x = 1,711,969.11/1,493.72
6. Step 6: Final answer
   x = 1,146.11