Finding the Fourth Proportional to 72,887.69, 109,340.73 and 28,508.67

Step by Step Solution

1. Step 1: Write the proportion equation
   72,887.69 : 109,340.73 = 28,508.67 : x
2. Step 2: Convert to fraction form
   72,887.69/109,340.73 = 28,508.67/x
3. Step 3: Cross multiply
   72,887.69x = 109,340.73 × 28,508.67
4. Step 4: Simplify right side
   72,887.69x = 3,117,158,789.13
5. Step 5: Solve for x
   x = 3,117,158,789.13/72,887.69
6. Step 6: Final answer
   x = 42,766.60