Finding the Fourth Proportional to 65,007.96, 89,366.56 and 55,899.97

Step by Step Solution

1. Step 1: Write the proportion equation
   65,007.96 : 89,366.56 = 55,899.97 : x
2. Step 2: Convert to fraction form
   65,007.96/89,366.56 = 55,899.97/x
3. Step 3: Cross multiply
   65,007.96x = 89,366.56 × 55,899.97
4. Step 4: Simplify right side
   65,007.96x = 4,995,587,659.84
5. Step 5: Solve for x
   x = 4,995,587,659.84/65,007.96
6. Step 6: Final answer
   x = 76,845.78