Finding the Fourth Proportional to 99,969.78, 150,028.50 and 47,379.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99,969.78 : 150,028.50 = 47,379.42 : x
2. Step 2: Convert to fraction form
   99,969.78/150,028.50 = 47,379.42/x
3. Step 3: Cross multiply
   99,969.78x = 150,028.50 × 47,379.42
4. Step 4: Simplify right side
   99,969.78x = 7,108,263,313.47
5. Step 5: Solve for x
   x = 7,108,263,313.47/99,969.78
6. Step 6: Final answer
   x = 71,104.12