Finding the Fourth Proportional to 76,717.57, 105,870.28 and 42,732.58

Step by Step Solution

1. Step 1: Write the proportion equation
   76,717.57 : 105,870.28 = 42,732.58 : x
2. Step 2: Convert to fraction form
   76,717.57/105,870.28 = 42,732.58/x
3. Step 3: Cross multiply
   76,717.57x = 105,870.28 × 42,732.58
4. Step 4: Simplify right side
   76,717.57x = 4,524,110,209.72
5. Step 5: Solve for x
   x = 4,524,110,209.72/76,717.57
6. Step 6: Final answer
   x = 58,970.98