Finding the Fourth Proportional to 65,420.48, 90,280.28 and 35,612.48

Step by Step Solution

1. Step 1: Write the proportion equation
   65,420.48 : 90,280.28 = 35,612.48 : x
2. Step 2: Convert to fraction form
   65,420.48/90,280.28 = 35,612.48/x
3. Step 3: Cross multiply
   65,420.48x = 90,280.28 × 35,612.48
4. Step 4: Simplify right side
   65,420.48x = 3,215,104,665.89
5. Step 5: Solve for x
   x = 3,215,104,665.89/65,420.48
6. Step 6: Final answer
   x = 49,145.23