Finding the Fourth Proportional to 145,895.41, 201,385.89 and 85,485.61

Step by Step Solution

1. Step 1: Write the proportion equation
   145,895.41 : 201,385.89 = 85,485.61 : x
2. Step 2: Convert to fraction form
   145,895.41/201,385.89 = 85,485.61/x
3. Step 3: Cross multiply
   145,895.41x = 201,385.89 × 85,485.61
4. Step 4: Simplify right side
   145,895.41x = 17,215,594,217.69
5. Step 5: Solve for x
   x = 17,215,594,217.69/145,895.41
6. Step 6: Final answer
   x = 117,999.56