Finding the Fourth Proportional to 117,139.56, 175,707.72 and 28,393.80

Step by Step Solution

1. Step 1: Write the proportion equation
   117,139.56 : 175,707.72 = 28,393.80 : x
2. Step 2: Convert to fraction form
   117,139.56/175,707.72 = 28,393.80/x
3. Step 3: Cross multiply
   117,139.56x = 175,707.72 × 28,393.80
4. Step 4: Simplify right side
   117,139.56x = 4,989,009,860.14
5. Step 5: Solve for x
   x = 4,989,009,860.14/117,139.56
6. Step 6: Final answer
   x = 42,590.31