Finding the Fourth Proportional to 2,925.12, 4,361.88 and 2,898.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,925.12 : 4,361.88 = 2,898.78 : x
2. Step 2: Convert to fraction form
   2,925.12/4,361.88 = 2,898.78/x
3. Step 3: Cross multiply
   2,925.12x = 4,361.88 × 2,898.78
4. Step 4: Simplify right side
   2,925.12x = 12,644,130.51
5. Step 5: Solve for x
   x = 12,644,130.51/2,925.12
6. Step 6: Final answer
   x = 4,322.60