Finding the Fourth Proportional to 145,521.99, 200,819.59 and 81,860.24

Step by Step Solution

1. Step 1: Write the proportion equation
   145,521.99 : 200,819.59 = 81,860.24 : x
2. Step 2: Convert to fraction form
   145,521.99/200,819.59 = 81,860.24/x
3. Step 3: Cross multiply
   145,521.99x = 200,819.59 × 81,860.24
4. Step 4: Simplify right side
   145,521.99x = 16,439,140,131.50
5. Step 5: Solve for x
   x = 16,439,140,131.50/145,521.99
6. Step 6: Final answer
   x = 112,966.71