Finding the Fourth Proportional to 2,931.91, 4,398.77 and 1,200.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.91 : 4,398.77 = 1,200.67 : x
2. Step 2: Convert to fraction form
   2,931.91/4,398.77 = 1,200.67/x
3. Step 3: Cross multiply
   2,931.91x = 4,398.77 × 1,200.67
4. Step 4: Simplify right side
   2,931.91x = 5,281,471.18
5. Step 5: Solve for x
   x = 5,281,471.18/2,931.91
6. Step 6: Final answer
   x = 1,801.38