Finding the Fourth Proportional to 76,748.80, 105,916.61 and 42,757.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76,748.80 : 105,916.61 = 42,757.27 : x
2. Step 2: Convert to fraction form
   76,748.80/105,916.61 = 42,757.27/x
3. Step 3: Cross multiply
   76,748.80x = 105,916.61 × 42,757.27
4. Step 4: Simplify right side
   76,748.80x = 4,528,704,933.36
5. Step 5: Solve for x
   x = 4,528,704,933.36/76,748.80
6. Step 6: Final answer
   x = 59,006.85