Finding the Fourth Proportional to 9,788.79, 13,499.35 and 7,547.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,788.79 : 13,499.35 = 7,547.12 : x
2. Step 2: Convert to fraction form
   9,788.79/13,499.35 = 7,547.12/x
3. Step 3: Cross multiply
   9,788.79x = 13,499.35 × 7,547.12
4. Step 4: Simplify right side
   9,788.79x = 101,881,214.37
5. Step 5: Solve for x
   x = 101,881,214.37/9,788.79
6. Step 6: Final answer
   x = 10,407.95