Finding the Fourth Proportional to 76,613.98, 105,719.70 and 47,928.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,613.98 : 105,719.70 = 47,928.10 : x
2. Step 2: Convert to fraction form
   76,613.98/105,719.70 = 47,928.10/x
3. Step 3: Cross multiply
   76,613.98x = 105,719.70 × 47,928.10
4. Step 4: Simplify right side
   76,613.98x = 5,066,944,353.57
5. Step 5: Solve for x
   x = 5,066,944,353.57/76,613.98
6. Step 6: Final answer
   x = 66,136.03