Finding the Fourth Proportional to 65,513.62, 90,408.30 and 37,219.31

Step by Step Solution

1. Step 1: Write the proportion equation
   65,513.62 : 90,408.30 = 37,219.31 : x
2. Step 2: Convert to fraction form
   65,513.62/90,408.30 = 37,219.31/x
3. Step 3: Cross multiply
   65,513.62x = 90,408.30 × 37,219.31
4. Step 4: Simplify right side
   65,513.62x = 3,364,934,544.27
5. Step 5: Solve for x
   x = 3,364,934,544.27/65,513.62
6. Step 6: Final answer
   x = 51,362.37