Finding the Fourth Proportional to 70,245.72, 105,412.50 and 28,692.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,245.72 : 105,412.50 = 28,692.72 : x
2. Step 2: Convert to fraction form
   70,245.72/105,412.50 = 28,692.72/x
3. Step 3: Cross multiply
   70,245.72x = 105,412.50 × 28,692.72
4. Step 4: Simplify right side
   70,245.72x = 3,024,571,347
5. Step 5: Solve for x
   x = 3,024,571,347/70,245.72
6. Step 6: Final answer
   x = 43,057.02