Finding the Fourth Proportional to 102,510.50, 153,791.68 and 28,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,510.50 : 153,791.68 = 28,638.50 : x
2. Step 2: Convert to fraction form
   102,510.50/153,791.68 = 28,638.50/x
3. Step 3: Cross multiply
   102,510.50x = 153,791.68 × 28,638.50
4. Step 4: Simplify right side
   102,510.50x = 4,404,363,027.68
5. Step 5: Solve for x
   x = 4,404,363,027.68/102,510.50
6. Step 6: Final answer
   x = 42,964.99