Finding the Fourth Proportional to 10,603.89, 15,906.24 and 2,812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,603.89 : 15,906.24 = 2,812.50 : x
2. Step 2: Convert to fraction form
   10,603.89/15,906.24 = 2,812.50/x
3. Step 3: Cross multiply
   10,603.89x = 15,906.24 × 2,812.50
4. Step 4: Simplify right side
   10,603.89x = 44,736,300
5. Step 5: Solve for x
   x = 44,736,300/10,603.89
6. Step 6: Final answer
   x = 4,218.86