Finding the Fourth Proportional to 28,603.86, 42,901.18 and 7,822.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,603.86 : 42,901.18 = 7,822.50 : x
2. Step 2: Convert to fraction form
   28,603.86/42,901.18 = 7,822.50/x
3. Step 3: Cross multiply
   28,603.86x = 42,901.18 × 7,822.50
4. Step 4: Simplify right side
   28,603.86x = 335,594,480.55
5. Step 5: Solve for x
   x = 335,594,480.55/28,603.86
6. Step 6: Final answer
   x = 11,732.49