Finding the Fourth Proportional to 140,134.89, 193,412.43 and 87,771.05

Step by Step Solution

1. Step 1: Write the proportion equation
   140,134.89 : 193,412.43 = 87,771.05 : x
2. Step 2: Convert to fraction form
   140,134.89/193,412.43 = 87,771.05/x
3. Step 3: Cross multiply
   140,134.89x = 193,412.43 × 87,771.05
4. Step 4: Simplify right side
   140,134.89x = 16,976,012,064.15
5. Step 5: Solve for x
   x = 16,976,012,064.15/140,134.89
6. Step 6: Final answer
   x = 121,140.51