Finding the Fourth Proportional to 85,451.32, 128,176.98 and 55,894.01

Step by Step Solution

1. Step 1: Write the proportion equation
   85,451.32 : 128,176.98 = 55,894.01 : x
2. Step 2: Convert to fraction form
   85,451.32/128,176.98 = 55,894.01/x
3. Step 3: Cross multiply
   85,451.32x = 128,176.98 × 55,894.01
4. Step 4: Simplify right side
   85,451.32x = 7,164,325,401.89
5. Step 5: Solve for x
   x = 7,164,325,401.89/85,451.32
6. Step 6: Final answer
   x = 83,841.02