Finding the Fourth Proportional to 9,899.51, 13,645.06 and 7,906.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,899.51 : 13,645.06 = 7,906.55 : x
2. Step 2: Convert to fraction form
   9,899.51/13,645.06 = 7,906.55/x
3. Step 3: Cross multiply
   9,899.51x = 13,645.06 × 7,906.55
4. Step 4: Simplify right side
   9,899.51x = 107,885,309.61
5. Step 5: Solve for x
   x = 107,885,309.61/9,899.51
6. Step 6: Final answer
   x = 10,898.05