Finding the Fourth Proportional to 76,738.85, 105,899.31 and 42,747.74

Step by Step Solution

1. Step 1: Write the proportion equation
   76,738.85 : 105,899.31 = 42,747.74 : x
2. Step 2: Convert to fraction form
   76,738.85/105,899.31 = 42,747.74/x
3. Step 3: Cross multiply
   76,738.85x = 105,899.31 × 42,747.74
4. Step 4: Simplify right side
   76,738.85x = 4,526,955,640.56
5. Step 5: Solve for x
   x = 4,526,955,640.56/76,738.85
6. Step 6: Final answer
   x = 58,991.71