Finding the Fourth Proportional to 37,061.76, 55,574.40 and 12,420.48

Step by Step Solution

1. Step 1: Write the proportion equation
   37,061.76 : 55,574.40 = 12,420.48 : x
2. Step 2: Convert to fraction form
   37,061.76/55,574.40 = 12,420.48/x
3. Step 3: Cross multiply
   37,061.76x = 55,574.40 × 12,420.48
4. Step 4: Simplify right side
   37,061.76x = 690,260,723.71
5. Step 5: Solve for x
   x = 690,260,723.71/37,061.76
6. Step 6: Final answer
   x = 18,624.61