Finding the Fourth Proportional to 37,407.31, 56,071.52 and 12,440.68

Step by Step Solution

1. Step 1: Write the proportion equation
   37,407.31 : 56,071.52 = 12,440.68 : x
2. Step 2: Convert to fraction form
   37,407.31/56,071.52 = 12,440.68/x
3. Step 3: Cross multiply
   37,407.31x = 56,071.52 × 12,440.68
4. Step 4: Simplify right side
   37,407.31x = 697,567,837.43
5. Step 5: Solve for x
   x = 697,567,837.43/37,407.31
6. Step 6: Final answer
   x = 18,647.90