Finding the Fourth Proportional to 2,478.52, 3,712.38 and 1,900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.52 : 3,712.38 = 1,900.72 : x
2. Step 2: Convert to fraction form
   2,478.52/3,712.38 = 1,900.72/x
3. Step 3: Cross multiply
   2,478.52x = 3,712.38 × 1,900.72
4. Step 4: Simplify right side
   2,478.52x = 7,056,194.91
5. Step 5: Solve for x
   x = 7,056,194.91/2,478.52
6. Step 6: Final answer
   x = 2,846.94