Finding the Fourth Proportional to 70,985.39, 106,372.89 and 28,814.15

Step by Step Solution

1. Step 1: Write the proportion equation
   70,985.39 : 106,372.89 = 28,814.15 : x
2. Step 2: Convert to fraction form
   70,985.39/106,372.89 = 28,814.15/x
3. Step 3: Cross multiply
   70,985.39x = 106,372.89 × 28,814.15
4. Step 4: Simplify right side
   70,985.39x = 3,065,044,674.33
5. Step 5: Solve for x
   x = 3,065,044,674.33/70,985.39
6. Step 6: Final answer
   x = 43,178.53