Finding the Fourth Proportional to 2,101.83, 2,900.34 and 1,217.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.83 : 2,900.34 = 1,217.67 : x
2. Step 2: Convert to fraction form
   2,101.83/2,900.34 = 1,217.67/x
3. Step 3: Cross multiply
   2,101.83x = 2,900.34 × 1,217.67
4. Step 4: Simplify right side
   2,101.83x = 3,531,657.01
5. Step 5: Solve for x
   x = 3,531,657.01/2,101.83
6. Step 6: Final answer
   x = 1,680.28