Finding the Fourth Proportional to 15,300.10, 21,106.33 and 9,998.02

Step by Step Solution

1. Step 1: Write the proportion equation
   15,300.10 : 21,106.33 = 9,998.02 : x
2. Step 2: Convert to fraction form
   15,300.10/21,106.33 = 9,998.02/x
3. Step 3: Cross multiply
   15,300.10x = 21,106.33 × 9,998.02
4. Step 4: Simplify right side
   15,300.10x = 211,021,509.47
5. Step 5: Solve for x
   x = 211,021,509.47/15,300.10
6. Step 6: Final answer
   x = 13,792.17