Finding the Fourth Proportional to 37,648.94, 56,470.32 and 12,688.43

Step by Step Solution

1. Step 1: Write the proportion equation
   37,648.94 : 56,470.32 = 12,688.43 : x
2. Step 2: Convert to fraction form
   37,648.94/56,470.32 = 12,688.43/x
3. Step 3: Cross multiply
   37,648.94x = 56,470.32 × 12,688.43
4. Step 4: Simplify right side
   37,648.94x = 716,519,420.05
5. Step 5: Solve for x
   x = 716,519,420.05/37,648.94
6. Step 6: Final answer
   x = 19,031.60