Finding the Fourth Proportional to 65,640.83, 98,436.94 and 51,628.10

Step by Step Solution

1. Step 1: Write the proportion equation
   65,640.83 : 98,436.94 = 51,628.10 : x
2. Step 2: Convert to fraction form
   65,640.83/98,436.94 = 51,628.10/x
3. Step 3: Cross multiply
   65,640.83x = 98,436.94 × 51,628.10
4. Step 4: Simplify right side
   65,640.83x = 5,082,111,560.76
5. Step 5: Solve for x
   x = 5,082,111,560.76/65,640.83
6. Step 6: Final answer
   x = 77,423.03