Finding the Fourth Proportional to 145,978.11, 201,449.94 and 85,536.72

Step by Step Solution

1. Step 1: Write the proportion equation
   145,978.11 : 201,449.94 = 85,536.72 : x
2. Step 2: Convert to fraction form
   145,978.11/201,449.94 = 85,536.72/x
3. Step 3: Cross multiply
   145,978.11x = 201,449.94 × 85,536.72
4. Step 4: Simplify right side
   145,978.11x = 17,231,367,111.80
5. Step 5: Solve for x
   x = 17,231,367,111.80/145,978.11
6. Step 6: Final answer
   x = 118,040.76