Finding the Fourth Proportional to 145,965.57, 201,432.38 and 78,897.57

Step by Step Solution

1. Step 1: Write the proportion equation
   145,965.57 : 201,432.38 = 78,897.57 : x
2. Step 2: Convert to fraction form
   145,965.57/201,432.38 = 78,897.57/x
3. Step 3: Cross multiply
   145,965.57x = 201,432.38 × 78,897.57
4. Step 4: Simplify right side
   145,965.57x = 15,892,524,906.83
5. Step 5: Solve for x
   x = 15,892,524,906.83/145,965.57
6. Step 6: Final answer
   x = 108,878.59