Finding the Fourth Proportional to 76,768.74, 105,938.10 and 42,775.47

Step by Step Solution

1. Step 1: Write the proportion equation
   76,768.74 : 105,938.10 = 42,775.47 : x
2. Step 2: Convert to fraction form
   76,768.74/105,938.10 = 42,775.47/x
3. Step 3: Cross multiply
   76,768.74x = 105,938.10 × 42,775.47
4. Step 4: Simplify right side
   76,768.74x = 4,531,552,018.41
5. Step 5: Solve for x
   x = 4,531,552,018.41/76,768.74
6. Step 6: Final answer
   x = 59,028.61