Finding the Fourth Proportional to 65,629.06, 90,536.58 and 42,958.06

Step by Step Solution

1. Step 1: Write the proportion equation
   65,629.06 : 90,536.58 = 42,958.06 : x
2. Step 2: Convert to fraction form
   65,629.06/90,536.58 = 42,958.06/x
3. Step 3: Cross multiply
   65,629.06x = 90,536.58 × 42,958.06
4. Step 4: Simplify right side
   65,629.06x = 3,889,275,835.83
5. Step 5: Solve for x
   x = 3,889,275,835.83/65,629.06
6. Step 6: Final answer
   x = 59,261.49