Finding the Fourth Proportional to 100,196.52, 138,267.79 and 57,178.38

Step by Step Solution

1. Step 1: Write the proportion equation
   100,196.52 : 138,267.79 = 57,178.38 : x
2. Step 2: Convert to fraction form
   100,196.52/138,267.79 = 57,178.38/x
3. Step 3: Cross multiply
   100,196.52x = 138,267.79 × 57,178.38
4. Step 4: Simplify right side
   100,196.52x = 7,905,928,613.94
5. Step 5: Solve for x
   x = 7,905,928,613.94/100,196.52
6. Step 6: Final answer
   x = 78,904.23