Finding the Fourth Proportional to 309,575.59, 464,365.01 and 140,978.35

Step by Step Solution

1. Step 1: Write the proportion equation
   309,575.59 : 464,365.01 = 140,978.35 : x
2. Step 2: Convert to fraction form
   309,575.59/464,365.01 = 140,978.35/x
3. Step 3: Cross multiply
   309,575.59x = 464,365.01 × 140,978.35
4. Step 4: Simplify right side
   309,575.59x = 65,465,412,907.53
5. Step 5: Solve for x
   x = 65,465,412,907.53/309,575.59
6. Step 6: Final answer
   x = 211,468.27