Finding the Fourth Proportional to 37,381.39, 56,081.52 and 12,421.57

Step by Step Solution

1. Step 1: Write the proportion equation
   37,381.39 : 56,081.52 = 12,421.57 : x
2. Step 2: Convert to fraction form
   37,381.39/56,081.52 = 12,421.57/x
3. Step 3: Cross multiply
   37,381.39x = 56,081.52 × 12,421.57
4. Step 4: Simplify right side
   37,381.39x = 696,620,526.39
5. Step 5: Solve for x
   x = 696,620,526.39/37,381.39
6. Step 6: Final answer
   x = 18,635.49