Finding the Fourth Proportional to 65,249.56, 90,081.70 and 42,958.36

Step by Step Solution

1. Step 1: Write the proportion equation
   65,249.56 : 90,081.70 = 42,958.36 : x
2. Step 2: Convert to fraction form
   65,249.56/90,081.70 = 42,958.36/x
3. Step 3: Cross multiply
   65,249.56x = 90,081.70 × 42,958.36
4. Step 4: Simplify right side
   65,249.56x = 3,869,762,098.01
5. Step 5: Solve for x
   x = 3,869,762,098.01/65,249.56
6. Step 6: Final answer
   x = 59,307.10