Finding the Fourth Proportional to 21,802.61, 30,086.56 and 12,370.97

Step by Step Solution

1. Step 1: Write the proportion equation
   21,802.61 : 30,086.56 = 12,370.97 : x
2. Step 2: Convert to fraction form
   21,802.61/30,086.56 = 12,370.97/x
3. Step 3: Cross multiply
   21,802.61x = 30,086.56 × 12,370.97
4. Step 4: Simplify right side
   21,802.61x = 372,199,931.16
5. Step 5: Solve for x
   x = 372,199,931.16/21,802.61
6. Step 6: Final answer
   x = 17,071.35