Finding the Fourth Proportional to 339,967.59, 469,155.75 and 189,064.59

Step by Step Solution

1. Step 1: Write the proportion equation
   339,967.59 : 469,155.75 = 189,064.59 : x
2. Step 2: Convert to fraction form
   339,967.59/469,155.75 = 189,064.59/x
3. Step 3: Cross multiply
   339,967.59x = 469,155.75 × 189,064.59
4. Step 4: Simplify right side
   339,967.59x = 88,700,739,519.89
5. Step 5: Solve for x
   x = 88,700,739,519.89/339,967.59
6. Step 6: Final answer
   x = 260,909.40