Finding the Fourth Proportional to 92,509.57, 138,819.71 and 39,919.05

Step by Step Solution

1. Step 1: Write the proportion equation
   92,509.57 : 138,819.71 = 39,919.05 : x
2. Step 2: Convert to fraction form
   92,509.57/138,819.71 = 39,919.05/x
3. Step 3: Cross multiply
   92,509.57x = 138,819.71 × 39,919.05
4. Step 4: Simplify right side
   92,509.57x = 5,541,550,944.48
5. Step 5: Solve for x
   x = 5,541,550,944.48/92,509.57
6. Step 6: Final answer
   x = 59,902.46