Finding the Fourth Proportional to 76,653.18, 105,778.71 and 42,660.54

Step by Step Solution

1. Step 1: Write the proportion equation
   76,653.18 : 105,778.71 = 42,660.54 : x
2. Step 2: Convert to fraction form
   76,653.18/105,778.71 = 42,660.54/x
3. Step 3: Cross multiply
   76,653.18x = 105,778.71 × 42,660.54
4. Step 4: Simplify right side
   76,653.18x = 4,512,576,889.10
5. Step 5: Solve for x
   x = 4,512,576,889.10/76,653.18
6. Step 6: Final answer
   x = 58,870.05