Finding the Fourth Proportional to 13,920.67, 19,210.67 and 7,951.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,920.67 : 19,210.67 = 7,951.51 : x
2. Step 2: Convert to fraction form
   13,920.67/19,210.67 = 7,951.51/x
3. Step 3: Cross multiply
   13,920.67x = 19,210.67 × 7,951.51
4. Step 4: Simplify right side
   13,920.67x = 152,753,834.61
5. Step 5: Solve for x
   x = 152,753,834.61/13,920.67
6. Step 6: Final answer
   x = 10,973.17