Finding the Fourth Proportional to 37,380.89, 56,080.77 and 12,421.07

Step by Step Solution

1. Step 1: Write the proportion equation
   37,380.89 : 56,080.77 = 12,421.07 : x
2. Step 2: Convert to fraction form
   37,380.89/56,080.77 = 12,421.07/x
3. Step 3: Cross multiply
   37,380.89x = 56,080.77 × 12,421.07
4. Step 4: Simplify right side
   37,380.89x = 696,582,889.42
5. Step 5: Solve for x
   x = 696,582,889.42/37,380.89
6. Step 6: Final answer
   x = 18,634.74