Finding the Fourth Proportional to 100,648.27, 138,894.89 and 57,628.42

Step by Step Solution

1. Step 1: Write the proportion equation
   100,648.27 : 138,894.89 = 57,628.42 : x
2. Step 2: Convert to fraction form
   100,648.27/138,894.89 = 57,628.42/x
3. Step 3: Cross multiply
   100,648.27x = 138,894.89 × 57,628.42
4. Step 4: Simplify right side
   100,648.27x = 8,004,293,056.77
5. Step 5: Solve for x
   x = 8,004,293,056.77/100,648.27
6. Step 6: Final answer
   x = 79,527.38