Finding the Fourth Proportional to 37,647.17, 56,456.35 and 12,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   37,647.17 : 56,456.35 = 12,680.50 : x
2. Step 2: Convert to fraction form
   37,647.17/56,456.35 = 12,680.50/x
3. Step 3: Cross multiply
   37,647.17x = 56,456.35 × 12,680.50
4. Step 4: Simplify right side
   37,647.17x = 715,894,746.18
5. Step 5: Solve for x
   x = 715,894,746.18/37,647.17
6. Step 6: Final answer
   x = 19,015.90