Finding the Fourth Proportional to 1,385.88, 1,912.58 and 796.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.88 : 1,912.58 = 796.74 : x
2. Step 2: Convert to fraction form
   1,385.88/1,912.58 = 796.74/x
3. Step 3: Cross multiply
   1,385.88x = 1,912.58 × 796.74
4. Step 4: Simplify right side
   1,385.88x = 1,523,828.99
5. Step 5: Solve for x
   x = 1,523,828.99/1,385.88
6. Step 6: Final answer
   x = 1,099.54