Finding the Fourth Proportional to 2,120.96, 2,925.30 and 1,858.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.96 : 2,925.30 = 1,858.52 : x
2. Step 2: Convert to fraction form
   2,120.96/2,925.30 = 1,858.52/x
3. Step 3: Cross multiply
   2,120.96x = 2,925.30 × 1,858.52
4. Step 4: Simplify right side
   2,120.96x = 5,436,728.56
5. Step 5: Solve for x
   x = 5,436,728.56/2,120.96
6. Step 6: Final answer
   x = 2,563.33