Finding the Fourth Proportional to 1,447.76, 1,997.91 and 784.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.76 : 1,997.91 = 784.61 : x
2. Step 2: Convert to fraction form
   1,447.76/1,997.91 = 784.61/x
3. Step 3: Cross multiply
   1,447.76x = 1,997.91 × 784.61
4. Step 4: Simplify right side
   1,447.76x = 1,567,576.20
5. Step 5: Solve for x
   x = 1,567,576.20/1,447.76
6. Step 6: Final answer
   x = 1,082.76