Finding the Fourth Proportional to 52,864.34, 72,952.89 and 28,991.19

Step by Step Solution

1. Step 1: Write the proportion equation
   52,864.34 : 72,952.89 = 28,991.19 : x
2. Step 2: Convert to fraction form
   52,864.34/72,952.89 = 28,991.19/x
3. Step 3: Cross multiply
   52,864.34x = 72,952.89 × 28,991.19
4. Step 4: Simplify right side
   52,864.34x = 2,114,991,095.04
5. Step 5: Solve for x
   x = 2,114,991,095.04/52,864.34
6. Step 6: Final answer
   x = 40,007.90