Finding the Fourth Proportional to 65,781.72, 90,777.42 and 35,973.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,781.72 : 90,777.42 = 35,973.72 : x
2. Step 2: Convert to fraction form
   65,781.72/90,777.42 = 35,973.72/x
3. Step 3: Cross multiply
   65,781.72x = 90,777.42 × 35,973.72
4. Step 4: Simplify right side
   65,781.72x = 3,265,601,489.40
5. Step 5: Solve for x
   x = 3,265,601,489.40/65,781.72
6. Step 6: Final answer
   x = 49,642.99