Finding the Fourth Proportional to 2,129.13, 3,196.71 and 1,206.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.13 : 3,196.71 = 1,206.50 : x
2. Step 2: Convert to fraction form
   2,129.13/3,196.71 = 1,206.50/x
3. Step 3: Cross multiply
   2,129.13x = 3,196.71 × 1,206.50
4. Step 4: Simplify right side
   2,129.13x = 3,856,830.62
5. Step 5: Solve for x
   x = 3,856,830.62/2,129.13
6. Step 6: Final answer
   x = 1,811.46