Finding the Fourth Proportional to 76,800.06, 105,984.56 and 42,810.71

Step by Step Solution

1. Step 1: Write the proportion equation
   76,800.06 : 105,984.56 = 42,810.71 : x
2. Step 2: Convert to fraction form
   76,800.06/105,984.56 = 42,810.71/x
3. Step 3: Cross multiply
   76,800.06x = 105,984.56 × 42,810.71
4. Step 4: Simplify right side
   76,800.06x = 4,537,273,839.74
5. Step 5: Solve for x
   x = 4,537,273,839.74/76,800.06
6. Step 6: Final answer
   x = 59,079.04