Finding the Fourth Proportional to 65,402, 90,231.50 and 42,754

Step by Step Solution

1. Step 1: Write the proportion equation
   65,402 : 90,231.50 = 42,754 : x
2. Step 2: Convert to fraction form
   65,402/90,231.50 = 42,754/x
3. Step 3: Cross multiply
   65,402x = 90,231.50 × 42,754
4. Step 4: Simplify right side
   65,402x = 3,857,757,551
5. Step 5: Solve for x
   x = 3,857,757,551/65,402
6. Step 6: Final answer
   x = 58,985.31