Finding the Fourth Proportional to 128,118.83, 176,877.74 and 85,156.56

Step by Step Solution

1. Step 1: Write the proportion equation
   128,118.83 : 176,877.74 = 85,156.56 : x
2. Step 2: Convert to fraction form
   128,118.83/176,877.74 = 85,156.56/x
3. Step 3: Cross multiply
   128,118.83x = 176,877.74 × 85,156.56
4. Step 4: Simplify right side
   128,118.83x = 15,062,300,091.87
5. Step 5: Solve for x
   x = 15,062,300,091.87/128,118.83
6. Step 6: Final answer
   x = 117,565.08