Finding the Fourth Proportional to 52,002.06, 71,762.64 and 28,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,002.06 : 71,762.64 = 28,128.72 : x
2. Step 2: Convert to fraction form
   52,002.06/71,762.64 = 28,128.72/x
3. Step 3: Cross multiply
   52,002.06x = 71,762.64 × 28,128.72
4. Step 4: Simplify right side
   52,002.06x = 2,018,591,207.02
5. Step 5: Solve for x
   x = 2,018,591,207.02/52,002.06
6. Step 6: Final answer
   x = 38,817.52