Finding the Fourth Proportional to 76,836.72, 106,026.12 and 42,842.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,836.72 : 106,026.12 = 42,842.28 : x
2. Step 2: Convert to fraction form
   76,836.72/106,026.12 = 42,842.28/x
3. Step 3: Cross multiply
   76,836.72x = 106,026.12 × 42,842.28
4. Step 4: Simplify right side
   76,836.72x = 4,542,400,720.35
5. Step 5: Solve for x
   x = 4,542,400,720.35/76,836.72
6. Step 6: Final answer
   x = 59,117.58