Finding the Fourth Proportional to 37,666.12, 56,520.78 and 13,990.12

Step by Step Solution

1. Step 1: Write the proportion equation
   37,666.12 : 56,520.78 = 13,990.12 : x
2. Step 2: Convert to fraction form
   37,666.12/56,520.78 = 13,990.12/x
3. Step 3: Cross multiply
   37,666.12x = 56,520.78 × 13,990.12
4. Step 4: Simplify right side
   37,666.12x = 790,732,494.69
5. Step 5: Solve for x
   x = 790,732,494.69/37,666.12
6. Step 6: Final answer
   x = 20,993.20