Finding the Fourth Proportional to 39,143.34, 58,697.55 and 12,484.35

Step by Step Solution

1. Step 1: Write the proportion equation
   39,143.34 : 58,697.55 = 12,484.35 : x
2. Step 2: Convert to fraction form
   39,143.34/58,697.55 = 12,484.35/x
3. Step 3: Cross multiply
   39,143.34x = 58,697.55 × 12,484.35
4. Step 4: Simplify right side
   39,143.34x = 732,800,758.34
5. Step 5: Solve for x
   x = 732,800,758.34/39,143.34
6. Step 6: Final answer
   x = 18,720.96