Finding the Fourth Proportional to 15,665.00, 21,618.90 and 9,700.16

Step by Step Solution

1. Step 1: Write the proportion equation
   15,665.00 : 21,618.90 = 9,700.16 : x
2. Step 2: Convert to fraction form
   15,665.00/21,618.90 = 9,700.16/x
3. Step 3: Cross multiply
   15,665.00x = 21,618.90 × 9,700.16
4. Step 4: Simplify right side
   15,665.00x = 209,706,680.93
5. Step 5: Solve for x
   x = 209,706,680.93/15,665.00
6. Step 6: Final answer
   x = 13,386.96