Finding the Fourth Proportional to 85,498.86, 128,226.32 and 40,475.82

Step by Step Solution

1. Step 1: Write the proportion equation
   85,498.86 : 128,226.32 = 40,475.82 : x
2. Step 2: Convert to fraction form
   85,498.86/128,226.32 = 40,475.82/x
3. Step 3: Cross multiply
   85,498.86x = 128,226.32 × 40,475.82
4. Step 4: Simplify right side
   85,498.86x = 5,190,065,447.58
5. Step 5: Solve for x
   x = 5,190,065,447.58/85,498.86
6. Step 6: Final answer
   x = 60,703.33