Finding the Fourth Proportional to 70,281, 105,396.12 and 28,170.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,281 : 105,396.12 = 28,170.72 : x
2. Step 2: Convert to fraction form
   70,281/105,396.12 = 28,170.72/x
3. Step 3: Cross multiply
   70,281x = 105,396.12 × 28,170.72
4. Step 4: Simplify right side
   70,281x = 2,969,084,585.61
5. Step 5: Solve for x
   x = 2,969,084,585.61/70,281
6. Step 6: Final answer
   x = 42,245.91