Finding the Fourth Proportional to 52,742.72, 72,784.90 and 28,869.18

Step by Step Solution

1. Step 1: Write the proportion equation
   52,742.72 : 72,784.90 = 28,869.18 : x
2. Step 2: Convert to fraction form
   52,742.72/72,784.90 = 28,869.18/x
3. Step 3: Cross multiply
   52,742.72x = 72,784.90 × 28,869.18
4. Step 4: Simplify right side
   52,742.72x = 2,101,240,379.38
5. Step 5: Solve for x
   x = 2,101,240,379.38/52,742.72
6. Step 6: Final answer
   x = 39,839.44