Finding the Fourth Proportional to 52,900.39, 72,911.63 and 50,409.03

Step by Step Solution

1. Step 1: Write the proportion equation
   52,900.39 : 72,911.63 = 50,409.03 : x
2. Step 2: Convert to fraction form
   52,900.39/72,911.63 = 50,409.03/x
3. Step 3: Cross multiply
   52,900.39x = 72,911.63 × 50,409.03
4. Step 4: Simplify right side
   52,900.39x = 3,675,404,291.97
5. Step 5: Solve for x
   x = 3,675,404,291.97/52,900.39
6. Step 6: Final answer
   x = 69,477.84