Finding the Fourth Proportional to 13,920.89, 19,210.80 and 7,633.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,920.89 : 19,210.80 = 7,633.25 : x
2. Step 2: Convert to fraction form
   13,920.89/19,210.80 = 7,633.25/x
3. Step 3: Cross multiply
   13,920.89x = 19,210.80 × 7,633.25
4. Step 4: Simplify right side
   13,920.89x = 146,640,839.10
5. Step 5: Solve for x
   x = 146,640,839.10/13,920.89
6. Step 6: Final answer
   x = 10,533.87