Finding the Fourth Proportional to 1,385.84, 1,912.43 and 826.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.84 : 1,912.43 = 826.11 : x
2. Step 2: Convert to fraction form
   1,385.84/1,912.43 = 826.11/x
3. Step 3: Cross multiply
   1,385.84x = 1,912.43 × 826.11
4. Step 4: Simplify right side
   1,385.84x = 1,579,867.30
5. Step 5: Solve for x
   x = 1,579,867.30/1,385.84
6. Step 6: Final answer
   x = 1,140.01