Finding the Fourth Proportional to 61,005.72, 91,389.38 and 42,027

Step by Step Solution

1. Step 1: Write the proportion equation
   61,005.72 : 91,389.38 = 42,027 : x
2. Step 2: Convert to fraction form
   61,005.72/91,389.38 = 42,027/x
3. Step 3: Cross multiply
   61,005.72x = 91,389.38 × 42,027
4. Step 4: Simplify right side
   61,005.72x = 3,840,821,473.26
5. Step 5: Solve for x
   x = 3,840,821,473.26/61,005.72
6. Step 6: Final answer
   x = 62,958.38