Finding the Fourth Proportional to 52,221.15, 72,064.72 and 28,347.81

Step by Step Solution

1. Step 1: Write the proportion equation
   52,221.15 : 72,064.72 = 28,347.81 : x
2. Step 2: Convert to fraction form
   52,221.15/72,064.72 = 28,347.81/x
3. Step 3: Cross multiply
   52,221.15x = 72,064.72 × 28,347.81
4. Step 4: Simplify right side
   52,221.15x = 2,042,876,990.26
5. Step 5: Solve for x
   x = 2,042,876,990.26/52,221.15
6. Step 6: Final answer
   x = 39,119.72