Finding the Fourth Proportional to 117,139.38, 175,708.59 and 28,392.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,139.38 : 175,708.59 = 28,392.78 : x
2. Step 2: Convert to fraction form
   117,139.38/175,708.59 = 28,392.78/x
3. Step 3: Cross multiply
   117,139.38x = 175,708.59 × 28,392.78
4. Step 4: Simplify right side
   117,139.38x = 4,988,855,339.98
5. Step 5: Solve for x
   x = 4,988,855,339.98/117,139.38
6. Step 6: Final answer
   x = 42,589.05