Finding the Fourth Proportional to 65,283.48, 90,059.16 and 42,612

Step by Step Solution

1. Step 1: Write the proportion equation
   65,283.48 : 90,059.16 = 42,612 : x
2. Step 2: Convert to fraction form
   65,283.48/90,059.16 = 42,612/x
3. Step 3: Cross multiply
   65,283.48x = 90,059.16 × 42,612
4. Step 4: Simplify right side
   65,283.48x = 3,837,600,925.92
5. Step 5: Solve for x
   x = 3,837,600,925.92/65,283.48
6. Step 6: Final answer
   x = 58,783.65