Finding the Fourth Proportional to 65,783.72, 90,780.18 and 35,975.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,783.72 : 90,780.18 = 35,975.72 : x
2. Step 2: Convert to fraction form
   65,783.72/90,780.18 = 35,975.72/x
3. Step 3: Cross multiply
   65,783.72x = 90,780.18 × 35,975.72
4. Step 4: Simplify right side
   65,783.72x = 3,265,882,337.23
5. Step 5: Solve for x
   x = 3,265,882,337.23/65,783.72
6. Step 6: Final answer
   x = 49,645.75