Finding the Fourth Proportional to 69,049.96, 103,518.72 and 21,640.72

Step by Step Solution

1. Step 1: Write the proportion equation
   69,049.96 : 103,518.72 = 21,640.72 : x
2. Step 2: Convert to fraction form
   69,049.96/103,518.72 = 21,640.72/x
3. Step 3: Cross multiply
   69,049.96x = 103,518.72 × 21,640.72
4. Step 4: Simplify right side
   69,049.96x = 2,240,219,634.28
5. Step 5: Solve for x
   x = 2,240,219,634.28/69,049.96
6. Step 6: Final answer
   x = 32,443.46