Finding the Fourth Proportional to 85,665.16, 128,552.58 and 46,249.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,665.16 : 128,552.58 = 46,249.72 : x
2. Step 2: Convert to fraction form
   85,665.16/128,552.58 = 46,249.72/x
3. Step 3: Cross multiply
   85,665.16x = 128,552.58 × 46,249.72
4. Step 4: Simplify right side
   85,665.16x = 5,945,520,830.28
5. Step 5: Solve for x
   x = 5,945,520,830.28/85,665.16
6. Step 6: Final answer
   x = 69,404.19