Finding the Fourth Proportional to 3,785.50, 5,224.71 and 2,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,785.50 : 5,224.71 = 2,129.50 : x
2. Step 2: Convert to fraction form
   3,785.50/5,224.71 = 2,129.50/x
3. Step 3: Cross multiply
   3,785.50x = 5,224.71 × 2,129.50
4. Step 4: Simplify right side
   3,785.50x = 11,126,019.95
5. Step 5: Solve for x
   x = 11,126,019.95/3,785.50
6. Step 6: Final answer
   x = 2,939.12