Finding the Fourth Proportional to 140,473.89, 193,799.79 and 86,665.59

Step by Step Solution

1. Step 1: Write the proportion equation
   140,473.89 : 193,799.79 = 86,665.59 : x
2. Step 2: Convert to fraction form
   140,473.89/193,799.79 = 86,665.59/x
3. Step 3: Cross multiply
   140,473.89x = 193,799.79 × 86,665.59
4. Step 4: Simplify right side
   140,473.89x = 16,795,773,142.23
5. Step 5: Solve for x
   x = 16,795,773,142.23/140,473.89
6. Step 6: Final answer
   x = 119,565.09