Finding the Fourth Proportional to 37,439.31, 56,140.18 and 12,470.58

Step by Step Solution

1. Step 1: Write the proportion equation
   37,439.31 : 56,140.18 = 12,470.58 : x
2. Step 2: Convert to fraction form
   37,439.31/56,140.18 = 12,470.58/x
3. Step 3: Cross multiply
   37,439.31x = 56,140.18 × 12,470.58
4. Step 4: Simplify right side
   37,439.31x = 700,100,605.90
5. Step 5: Solve for x
   x = 700,100,605.90/37,439.31
6. Step 6: Final answer
   x = 18,699.61