Finding the Fourth Proportional to 12,498.25, 18,746.90 and 3,138.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,498.25 : 18,746.90 = 3,138.34 : x
2. Step 2: Convert to fraction form
   12,498.25/18,746.90 = 3,138.34/x
3. Step 3: Cross multiply
   12,498.25x = 18,746.90 × 3,138.34
4. Step 4: Simplify right side
   12,498.25x = 58,834,036.72
5. Step 5: Solve for x
   x = 58,834,036.72/12,498.25
6. Step 6: Final answer
   x = 4,707.38