Finding the Fourth Proportional to 102,508.50, 153,788.67 and 28,636.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,508.50 : 153,788.67 = 28,636.50 : x
2. Step 2: Convert to fraction form
   102,508.50/153,788.67 = 28,636.50/x
3. Step 3: Cross multiply
   102,508.50x = 153,788.67 × 28,636.50
4. Step 4: Simplify right side
   102,508.50x = 4,403,969,248.46
5. Step 5: Solve for x
   x = 4,403,969,248.46/102,508.50
6. Step 6: Final answer
   x = 42,961.99