Finding the Fourth Proportional to 1,909.64, 2,861.82 and 1,420.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.64 : 2,861.82 = 1,420.52 : x
2. Step 2: Convert to fraction form
   1,909.64/2,861.82 = 1,420.52/x
3. Step 3: Cross multiply
   1,909.64x = 2,861.82 × 1,420.52
4. Step 4: Simplify right side
   1,909.64x = 4,065,272.55
5. Step 5: Solve for x
   x = 4,065,272.55/1,909.64
6. Step 6: Final answer
   x = 2,128.82