Finding the Fourth Proportional to 86,510.61, 119,387.49 and 50,209.31

Step by Step Solution

1. Step 1: Write the proportion equation
   86,510.61 : 119,387.49 = 50,209.31 : x
2. Step 2: Convert to fraction form
   86,510.61/119,387.49 = 50,209.31/x
3. Step 3: Cross multiply
   86,510.61x = 119,387.49 × 50,209.31
4. Step 4: Simplify right side
   86,510.61x = 5,994,363,495.53
5. Step 5: Solve for x
   x = 5,994,363,495.53/86,510.61
6. Step 6: Final answer
   x = 69,290.50