Finding the Fourth Proportional to 76,618.81, 105,738.72 and 42,634.88

Step by Step Solution

1. Step 1: Write the proportion equation
   76,618.81 : 105,738.72 = 42,634.88 : x
2. Step 2: Convert to fraction form
   76,618.81/105,738.72 = 42,634.88/x
3. Step 3: Cross multiply
   76,618.81x = 105,738.72 × 42,634.88
4. Step 4: Simplify right side
   76,618.81x = 4,508,157,643.89
5. Step 5: Solve for x
   x = 4,508,157,643.89/76,618.81
6. Step 6: Final answer
   x = 58,838.78