Finding the Fourth Proportional to 76,744.77, 105,906.18 and 42,753.21

Step by Step Solution

1. Step 1: Write the proportion equation
   76,744.77 : 105,906.18 = 42,753.21 : x
2. Step 2: Convert to fraction form
   76,744.77/105,906.18 = 42,753.21/x
3. Step 3: Cross multiply
   76,744.77x = 105,906.18 × 42,753.21
4. Step 4: Simplify right side
   76,744.77x = 4,527,829,153.84
5. Step 5: Solve for x
   x = 4,527,829,153.84/76,744.77
6. Step 6: Final answer
   x = 58,998.54