Finding the Fourth Proportional to 102,536.72, 153,805.80 and 28,664.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,536.72 : 153,805.80 = 28,664.72 : x
2. Step 2: Convert to fraction form
   102,536.72/153,805.80 = 28,664.72/x
3. Step 3: Cross multiply
   102,536.72x = 153,805.80 × 28,664.72
4. Step 4: Simplify right side
   102,536.72x = 4,408,800,191.38
5. Step 5: Solve for x
   x = 4,408,800,191.38/102,536.72
6. Step 6: Final answer
   x = 42,997.28