Finding the Fourth Proportional to 309,693.25, 464,538.99 and 85,053.89

Step by Step Solution

1. Step 1: Write the proportion equation
   309,693.25 : 464,538.99 = 85,053.89 : x
2. Step 2: Convert to fraction form
   309,693.25/464,538.99 = 85,053.89/x
3. Step 3: Cross multiply
   309,693.25x = 464,538.99 × 85,053.89
4. Step 4: Simplify right side
   309,693.25x = 39,510,847,730.90
5. Step 5: Solve for x
   x = 39,510,847,730.90/309,693.25
6. Step 6: Final answer
   x = 127,580.59