Finding the Fourth Proportional to 100,067, 138,099.94 and 57,047.52

Step by Step Solution

1. Step 1: Write the proportion equation
   100,067 : 138,099.94 = 57,047.52 : x
2. Step 2: Convert to fraction form
   100,067/138,099.94 = 57,047.52/x
3. Step 3: Cross multiply
   100,067x = 138,099.94 × 57,047.52
4. Step 4: Simplify right side
   100,067x = 7,878,259,089.15
5. Step 5: Solve for x
   x = 7,878,259,089.15/100,067
6. Step 6: Final answer
   x = 78,729.84