Finding the Fourth Proportional to 65,319.72, 90,141.78 and 37,020.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,319.72 : 90,141.78 = 37,020.12 : x
2. Step 2: Convert to fraction form
   65,319.72/90,141.78 = 37,020.12/x
3. Step 3: Cross multiply
   65,319.72x = 90,141.78 × 37,020.12
4. Step 4: Simplify right side
   65,319.72x = 3,337,059,512.61
5. Step 5: Solve for x
   x = 3,337,059,512.61/65,319.72
6. Step 6: Final answer
   x = 51,088.09