Finding the Fourth Proportional to 86,089.20, 118,810.52 and 50,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   86,089.20 : 118,810.52 = 50,290.72 : x
2. Step 2: Convert to fraction form
   86,089.20/118,810.52 = 50,290.72/x
3. Step 3: Cross multiply
   86,089.20x = 118,810.52 × 50,290.72
4. Step 4: Simplify right side
   86,089.20x = 5,975,066,594.37
5. Step 5: Solve for x
   x = 5,975,066,594.37/86,089.20
6. Step 6: Final answer
   x = 69,405.53