Finding the Fourth Proportional to 112,784.09, 155,631.71 and 65,028.21

Step by Step Solution

1. Step 1: Write the proportion equation
   112,784.09 : 155,631.71 = 65,028.21 : x
2. Step 2: Convert to fraction form
   112,784.09/155,631.71 = 65,028.21/x
3. Step 3: Cross multiply
   112,784.09x = 155,631.71 × 65,028.21
4. Step 4: Simplify right side
   112,784.09x = 10,120,451,520.54
5. Step 5: Solve for x
   x = 10,120,451,520.54/112,784.09
6. Step 6: Final answer
   x = 89,732.97