Finding the Fourth Proportional to 2,118.55, 2,925.05 and 1,620.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.55 : 2,925.05 = 1,620.32 : x
2. Step 2: Convert to fraction form
   2,118.55/2,925.05 = 1,620.32/x
3. Step 3: Cross multiply
   2,118.55x = 2,925.05 × 1,620.32
4. Step 4: Simplify right side
   2,118.55x = 4,739,517.02
5. Step 5: Solve for x
   x = 4,739,517.02/2,118.55
6. Step 6: Final answer
   x = 2,237.15