Finding the Fourth Proportional to 65,404.72, 90,275.88 and 40,275.28

Step by Step Solution

1. Step 1: Write the proportion equation
   65,404.72 : 90,275.88 = 40,275.28 : x
2. Step 2: Convert to fraction form
   65,404.72/90,275.88 = 40,275.28/x
3. Step 3: Cross multiply
   65,404.72x = 90,275.88 × 40,275.28
4. Step 4: Simplify right side
   65,404.72x = 3,635,886,344.25
5. Step 5: Solve for x
   x = 3,635,886,344.25/65,404.72
6. Step 6: Final answer
   x = 55,590.58