Finding the Fourth Proportional to 65,628.69, 90,536.07 and 42,957.69

Step by Step Solution

1. Step 1: Write the proportion equation
   65,628.69 : 90,536.07 = 42,957.69 : x
2. Step 2: Convert to fraction form
   65,628.69/90,536.07 = 42,957.69/x
3. Step 3: Cross multiply
   65,628.69x = 90,536.07 × 42,957.69
4. Step 4: Simplify right side
   65,628.69x = 3,889,220,428.88
5. Step 5: Solve for x
   x = 3,889,220,428.88/65,628.69
6. Step 6: Final answer
   x = 59,260.98