Finding the Fourth Proportional to 68,776.16, 103,262.72 and 51,061.46

Step by Step Solution

1. Step 1: Write the proportion equation
   68,776.16 : 103,262.72 = 51,061.46 : x
2. Step 2: Convert to fraction form
   68,776.16/103,262.72 = 51,061.46/x
3. Step 3: Cross multiply
   68,776.16x = 103,262.72 × 51,061.46
4. Step 4: Simplify right side
   68,776.16x = 5,272,744,475.15
5. Step 5: Solve for x
   x = 5,272,744,475.15/68,776.16
6. Step 6: Final answer
   x = 76,665.30