Finding the Fourth Proportional to 52,219.20, 72,062.86 and 28,345.87

Step by Step Solution

1. Step 1: Write the proportion equation
   52,219.20 : 72,062.86 = 28,345.87 : x
2. Step 2: Convert to fraction form
   52,219.20/72,062.86 = 28,345.87/x
3. Step 3: Cross multiply
   52,219.20x = 72,062.86 × 28,345.87
4. Step 4: Simplify right side
   52,219.20x = 2,042,684,461.39
5. Step 5: Solve for x
   x = 2,042,684,461.39/52,219.20
6. Step 6: Final answer
   x = 39,117.50