Finding the Fourth Proportional to 76,739.60, 105,900.35 and 42,748.49

Step by Step Solution

1. Step 1: Write the proportion equation
   76,739.60 : 105,900.35 = 42,748.49 : x
2. Step 2: Convert to fraction form
   76,739.60/105,900.35 = 42,748.49/x
3. Step 3: Cross multiply
   76,739.60x = 105,900.35 × 42,748.49
4. Step 4: Simplify right side
   76,739.60x = 4,527,079,309.73
5. Step 5: Solve for x
   x = 4,527,079,309.73/76,739.60
6. Step 6: Final answer
   x = 58,992.74