Finding the Fourth Proportional to 11,498.04, 15,858.02 and 7,720.06

Step by Step Solution

1. Step 1: Write the proportion equation
   11,498.04 : 15,858.02 = 7,720.06 : x
2. Step 2: Convert to fraction form
   11,498.04/15,858.02 = 7,720.06/x
3. Step 3: Cross multiply
   11,498.04x = 15,858.02 × 7,720.06
4. Step 4: Simplify right side
   11,498.04x = 122,424,865.88
5. Step 5: Solve for x
   x = 122,424,865.88/11,498.04
6. Step 6: Final answer
   x = 10,647.46