Finding the Fourth Proportional to 76,682.78, 105,819.62 and 43,142.30

Step by Step Solution

1. Step 1: Write the proportion equation
   76,682.78 : 105,819.62 = 43,142.30 : x
2. Step 2: Convert to fraction form
   76,682.78/105,819.62 = 43,142.30/x
3. Step 3: Cross multiply
   76,682.78x = 105,819.62 × 43,142.30
4. Step 4: Simplify right side
   76,682.78x = 4,565,301,791.93
5. Step 5: Solve for x
   x = 4,565,301,791.93/76,682.78
6. Step 6: Final answer
   x = 59,534.90