Finding the Fourth Proportional to 76,775.79, 105,925.61 and 42,777.73

Step by Step Solution

1. Step 1: Write the proportion equation
   76,775.79 : 105,925.61 = 42,777.73 : x
2. Step 2: Convert to fraction form
   76,775.79/105,925.61 = 42,777.73/x
3. Step 3: Cross multiply
   76,775.79x = 105,925.61 × 42,777.73
4. Step 4: Simplify right side
   76,775.79x = 4,531,257,144.67
5. Step 5: Solve for x
   x = 4,531,257,144.67/76,775.79
6. Step 6: Final answer
   x = 59,019.35