Finding the Fourth Proportional to 70,991.84, 106,485.18 and 28,870.73

Step by Step Solution

1. Step 1: Write the proportion equation
   70,991.84 : 106,485.18 = 28,870.73 : x
2. Step 2: Convert to fraction form
   70,991.84/106,485.18 = 28,870.73/x
3. Step 3: Cross multiply
   70,991.84x = 106,485.18 × 28,870.73
4. Step 4: Simplify right side
   70,991.84x = 3,074,304,801.81
5. Step 5: Solve for x
   x = 3,074,304,801.81/70,991.84
6. Step 6: Final answer
   x = 43,305.04