Finding the Fourth Proportional to 52,859.07, 72,945 and 28,985.67

Step by Step Solution

1. Step 1: Write the proportion equation
   52,859.07 : 72,945 = 28,985.67 : x
2. Step 2: Convert to fraction form
   52,859.07/72,945 = 28,985.67/x
3. Step 3: Cross multiply
   52,859.07x = 72,945 × 28,985.67
4. Step 4: Simplify right side
   52,859.07x = 2,114,359,698.15
5. Step 5: Solve for x
   x = 2,114,359,698.15/52,859.07
6. Step 6: Final answer
   x = 39,999.94