Finding the Fourth Proportional to 37,688.64, 56,509.72 and 12,726.31

Step by Step Solution

1. Step 1: Write the proportion equation
   37,688.64 : 56,509.72 = 12,726.31 : x
2. Step 2: Convert to fraction form
   37,688.64/56,509.72 = 12,726.31/x
3. Step 3: Cross multiply
   37,688.64x = 56,509.72 × 12,726.31
4. Step 4: Simplify right side
   37,688.64x = 719,160,356.01
5. Step 5: Solve for x
   x = 719,160,356.01/37,688.64
6. Step 6: Final answer
   x = 19,081.62