Finding the Fourth Proportional to 69,777, 96,294.78 and 39,974.76

Step by Step Solution

1. Step 1: Write the proportion equation
   69,777 : 96,294.78 = 39,974.76 : x
2. Step 2: Convert to fraction form
   69,777/96,294.78 = 39,974.76/x
3. Step 3: Cross multiply
   69,777x = 96,294.78 × 39,974.76
4. Step 4: Simplify right side
   69,777x = 3,849,360,719.75
5. Step 5: Solve for x
   x = 3,849,360,719.75/69,777
6. Step 6: Final answer
   x = 55,166.61