Finding the Fourth Proportional to 76,613.24, 105,726.26 and 42,621.39

Step by Step Solution

1. Step 1: Write the proportion equation
   76,613.24 : 105,726.26 = 42,621.39 : x
2. Step 2: Convert to fraction form
   76,613.24/105,726.26 = 42,621.39/x
3. Step 3: Cross multiply
   76,613.24x = 105,726.26 × 42,621.39
4. Step 4: Simplify right side
   76,613.24x = 4,506,200,267.25
5. Step 5: Solve for x
   x = 4,506,200,267.25/76,613.24
6. Step 6: Final answer
   x = 58,817.51