Finding the Fourth Proportional to 2,061.12, 3,091.68 and 522

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.12 : 3,091.68 = 522 : x
2. Step 2: Convert to fraction form
   2,061.12/3,091.68 = 522/x
3. Step 3: Cross multiply
   2,061.12x = 3,091.68 × 522
4. Step 4: Simplify right side
   2,061.12x = 1,613,856.96
5. Step 5: Solve for x
   x = 1,613,856.96/2,061.12
6. Step 6: Final answer
   x = 783