Finding the Fourth Proportional to 37,609.50, 56,440.17 and 12,985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   37,609.50 : 56,440.17 = 12,985.50 : x
2. Step 2: Convert to fraction form
   37,609.50/56,440.17 = 12,985.50/x
3. Step 3: Cross multiply
   37,609.50x = 56,440.17 × 12,985.50
4. Step 4: Simplify right side
   37,609.50x = 732,903,827.54
5. Step 5: Solve for x
   x = 732,903,827.54/37,609.50
6. Step 6: Final answer
   x = 19,487.20