Finding the Fourth Proportional to 85,632.26, 128,467.89 and 46,188.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,632.26 : 128,467.89 = 46,188.50 : x
2. Step 2: Convert to fraction form
   85,632.26/128,467.89 = 46,188.50/x
3. Step 3: Cross multiply
   85,632.26x = 128,467.89 × 46,188.50
4. Step 4: Simplify right side
   85,632.26x = 5,933,738,494.93
5. Step 5: Solve for x
   x = 5,933,738,494.93/85,632.26
6. Step 6: Final answer
   x = 69,293.26