Finding the Fourth Proportional to 9,788.56, 13,507.98 and 5,312.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,788.56 : 13,507.98 = 5,312.12 : x
2. Step 2: Convert to fraction form
   9,788.56/13,507.98 = 5,312.12/x
3. Step 3: Cross multiply
   9,788.56x = 13,507.98 × 5,312.12
4. Step 4: Simplify right side
   9,788.56x = 71,756,010.72
5. Step 5: Solve for x
   x = 71,756,010.72/9,788.56
6. Step 6: Final answer
   x = 7,330.60