Finding the Fourth Proportional to 3,472.50, 5,206.86 and 1,131.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,472.50 : 5,206.86 = 1,131.78 : x
2. Step 2: Convert to fraction form
   3,472.50/5,206.86 = 1,131.78/x
3. Step 3: Cross multiply
   3,472.50x = 5,206.86 × 1,131.78
4. Step 4: Simplify right side
   3,472.50x = 5,893,020.01
5. Step 5: Solve for x
   x = 5,893,020.01/3,472.50
6. Step 6: Final answer
   x = 1,697.05