Finding the Fourth Proportional to 52,260.12, 72,117.72 and 28,386.54

Step by Step Solution

1. Step 1: Write the proportion equation
   52,260.12 : 72,117.72 = 28,386.54 : x
2. Step 2: Convert to fraction form
   52,260.12/72,117.72 = 28,386.54/x
3. Step 3: Cross multiply
   52,260.12x = 72,117.72 × 28,386.54
4. Step 4: Simplify right side
   52,260.12x = 2,047,172,543.49
5. Step 5: Solve for x
   x = 2,047,172,543.49/52,260.12
6. Step 6: Final answer
   x = 39,172.75