Finding the Fourth Proportional to 2,152.58, 3,228.86 and 1,421.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.58 : 3,228.86 = 1,421.98 : x
2. Step 2: Convert to fraction form
   2,152.58/3,228.86 = 1,421.98/x
3. Step 3: Cross multiply
   2,152.58x = 3,228.86 × 1,421.98
4. Step 4: Simplify right side
   2,152.58x = 4,591,374.34
5. Step 5: Solve for x
   x = 4,591,374.34/2,152.58
6. Step 6: Final answer
   x = 2,132.96