Finding the Fourth Proportional to 9,815.51, 14,712.71 and 7,140.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,815.51 : 14,712.71 = 7,140.69 : x
2. Step 2: Convert to fraction form
   9,815.51/14,712.71 = 7,140.69/x
3. Step 3: Cross multiply
   9,815.51x = 14,712.71 × 7,140.69
4. Step 4: Simplify right side
   9,815.51x = 105,058,865.47
5. Step 5: Solve for x
   x = 105,058,865.47/9,815.51
6. Step 6: Final answer
   x = 10,703.35