Finding the Fourth Proportional to 71,019.94, 106,530.07 and 28,870.28

Step by Step Solution

1. Step 1: Write the proportion equation
   71,019.94 : 106,530.07 = 28,870.28 : x
2. Step 2: Convert to fraction form
   71,019.94/106,530.07 = 28,870.28/x
3. Step 3: Cross multiply
   71,019.94x = 106,530.07 × 28,870.28
4. Step 4: Simplify right side
   71,019.94x = 3,075,552,949.32
5. Step 5: Solve for x
   x = 3,075,552,949.32/71,019.94
6. Step 6: Final answer
   x = 43,305.49