Finding the Fourth Proportional to 76,751.20, 105,909.42 and 42,756.22

Step by Step Solution

1. Step 1: Write the proportion equation
   76,751.20 : 105,909.42 = 42,756.22 : x
2. Step 2: Convert to fraction form
   76,751.20/105,909.42 = 42,756.22/x
3. Step 3: Cross multiply
   76,751.20x = 105,909.42 × 42,756.22
4. Step 4: Simplify right side
   76,751.20x = 4,528,286,461.59
5. Step 5: Solve for x
   x = 4,528,286,461.59/76,751.20
6. Step 6: Final answer
   x = 58,999.55