Finding the Fourth Proportional to 102,116.81, 140,919.94 and 57,404.81

Step by Step Solution

1. Step 1: Write the proportion equation
   102,116.81 : 140,919.94 = 57,404.81 : x
2. Step 2: Convert to fraction form
   102,116.81/140,919.94 = 57,404.81/x
3. Step 3: Cross multiply
   102,116.81x = 140,919.94 × 57,404.81
4. Step 4: Simplify right side
   102,116.81x = 8,089,482,380.91
5. Step 5: Solve for x
   x = 8,089,482,380.91/102,116.81
6. Step 6: Final answer
   x = 79,217.93