Finding the Fourth Proportional to 28,707.18, 42,748.82 and 28,603.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,707.18 : 42,748.82 = 28,603.50 : x
2. Step 2: Convert to fraction form
   28,707.18/42,748.82 = 28,603.50/x
3. Step 3: Cross multiply
   28,707.18x = 42,748.82 × 28,603.50
4. Step 4: Simplify right side
   28,707.18x = 1,222,765,729.85
5. Step 5: Solve for x
   x = 1,222,765,729.85/28,707.18
6. Step 6: Final answer
   x = 42,594.42