Finding the Fourth Proportional to 65,256.56, 90,091.36 and 42,965.36

Step by Step Solution

1. Step 1: Write the proportion equation
   65,256.56 : 90,091.36 = 42,965.36 : x
2. Step 2: Convert to fraction form
   65,256.56/90,091.36 = 42,965.36/x
3. Step 3: Cross multiply
   65,256.56x = 90,091.36 × 42,965.36
4. Step 4: Simplify right side
   65,256.56x = 3,870,807,715.29
5. Step 5: Solve for x
   x = 3,870,807,715.29/65,256.56
6. Step 6: Final answer
   x = 59,316.76