Finding the Fourth Proportional to 76,261.55, 105,241.69 and 42,270.77

Step by Step Solution

1. Step 1: Write the proportion equation
   76,261.55 : 105,241.69 = 42,270.77 : x
2. Step 2: Convert to fraction form
   76,261.55/105,241.69 = 42,270.77/x
3. Step 3: Cross multiply
   76,261.55x = 105,241.69 × 42,270.77
4. Step 4: Simplify right side
   76,261.55x = 4,448,646,640.52
5. Step 5: Solve for x
   x = 4,448,646,640.52/76,261.55
6. Step 6: Final answer
   x = 58,334.07