Finding the Fourth Proportional to 28,761.05, 42,910.56 and 25,603.57

Step by Step Solution

1. Step 1: Write the proportion equation
   28,761.05 : 42,910.56 = 25,603.57 : x
2. Step 2: Convert to fraction form
   28,761.05/42,910.56 = 25,603.57/x
3. Step 3: Cross multiply
   28,761.05x = 42,910.56 × 25,603.57
4. Step 4: Simplify right side
   28,761.05x = 1,098,663,526.70
5. Step 5: Solve for x
   x = 1,098,663,526.70/28,761.05
6. Step 6: Final answer
   x = 38,199.70