Finding the Fourth Proportional to 140,111.30, 193,357.86 and 79,690.64

Step by Step Solution

1. Step 1: Write the proportion equation
   140,111.30 : 193,357.86 = 79,690.64 : x
2. Step 2: Convert to fraction form
   140,111.30/193,357.86 = 79,690.64/x
3. Step 3: Cross multiply
   140,111.30x = 193,357.86 × 79,690.64
4. Step 4: Simplify right side
   140,111.30x = 15,408,811,612.43
5. Step 5: Solve for x
   x = 15,408,811,612.43/140,111.30
6. Step 6: Final answer
   x = 109,975.51