Finding the Fourth Proportional to 43,074.09, 64,545.17 and 28,981.91

Step by Step Solution

1. Step 1: Write the proportion equation
   43,074.09 : 64,545.17 = 28,981.91 : x
2. Step 2: Convert to fraction form
   43,074.09/64,545.17 = 28,981.91/x
3. Step 3: Cross multiply
   43,074.09x = 64,545.17 × 28,981.91
4. Step 4: Simplify right side
   43,074.09x = 1,870,642,324.33
5. Step 5: Solve for x
   x = 1,870,642,324.33/43,074.09
6. Step 6: Final answer
   x = 43,428.48