Finding the Fourth Proportional to 102,019.50, 153,038.07 and 28,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,019.50 : 153,038.07 = 28,147.50 : x
2. Step 2: Convert to fraction form
   102,019.50/153,038.07 = 28,147.50/x
3. Step 3: Cross multiply
   102,019.50x = 153,038.07 × 28,147.50
4. Step 4: Simplify right side
   102,019.50x = 4,307,639,075.33
5. Step 5: Solve for x
   x = 4,307,639,075.33/102,019.50
6. Step 6: Final answer
   x = 42,223.68