Finding the Fourth Proportional to 76,669.79, 105,810.78 and 43,142.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76,669.79 : 105,810.78 = 43,142.27 : x
2. Step 2: Convert to fraction form
   76,669.79/105,810.78 = 43,142.27/x
3. Step 3: Cross multiply
   76,669.79x = 105,810.78 × 43,142.27
4. Step 4: Simplify right side
   76,669.79x = 4,564,916,710.62
5. Step 5: Solve for x
   x = 4,564,916,710.62/76,669.79
6. Step 6: Final answer
   x = 59,539.97