Finding the Fourth Proportional to 1,421.46, 2,123.20 and 1,395.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.46 : 2,123.20 = 1,395.50 : x
2. Step 2: Convert to fraction form
   1,421.46/2,123.20 = 1,395.50/x
3. Step 3: Cross multiply
   1,421.46x = 2,123.20 × 1,395.50
4. Step 4: Simplify right side
   1,421.46x = 2,962,925.60
5. Step 5: Solve for x
   x = 2,962,925.60/1,421.46
6. Step 6: Final answer
   x = 2,084.42