Finding the Fourth Proportional to 65,905.12, 98,757.91 and 43,638.76

Step by Step Solution

1. Step 1: Write the proportion equation
   65,905.12 : 98,757.91 = 43,638.76 : x
2. Step 2: Convert to fraction form
   65,905.12/98,757.91 = 43,638.76/x
3. Step 3: Cross multiply
   65,905.12x = 98,757.91 × 43,638.76
4. Step 4: Simplify right side
   65,905.12x = 4,309,672,732.59
5. Step 5: Solve for x
   x = 4,309,672,732.59/65,905.12
6. Step 6: Final answer
   x = 65,392.08