Finding the Fourth Proportional to 262,120.50, 393,181.02 and 65,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   262,120.50 : 393,181.02 = 65,128.50 : x
2. Step 2: Convert to fraction form
   262,120.50/393,181.02 = 65,128.50/x
3. Step 3: Cross multiply
   262,120.50x = 393,181.02 × 65,128.50
4. Step 4: Simplify right side
   262,120.50x = 25,607,290,061.07
5. Step 5: Solve for x
   x = 25,607,290,061.07/262,120.50
6. Step 6: Final answer
   x = 97,692.82