Finding the Fourth Proportional to 65,781.05, 90,707.75 and 53,020.82

Step by Step Solution

1. Step 1: Write the proportion equation
   65,781.05 : 90,707.75 = 53,020.82 : x
2. Step 2: Convert to fraction form
   65,781.05/90,707.75 = 53,020.82/x
3. Step 3: Cross multiply
   65,781.05x = 90,707.75 × 53,020.82
4. Step 4: Simplify right side
   65,781.05x = 4,809,398,566.71
5. Step 5: Solve for x
   x = 4,809,398,566.71/65,781.05
6. Step 6: Final answer
   x = 73,112.23