Finding the Fourth Proportional to 2,120.64, 2,925.89 and 1,374.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.64 : 2,925.89 = 1,374.63 : x
2. Step 2: Convert to fraction form
   2,120.64/2,925.89 = 1,374.63/x
3. Step 3: Cross multiply
   2,120.64x = 2,925.89 × 1,374.63
4. Step 4: Simplify right side
   2,120.64x = 4,022,009.30
5. Step 5: Solve for x
   x = 4,022,009.30/2,120.64
6. Step 6: Final answer
   x = 1,896.60