Finding the Fourth Proportional to 21,802.50, 30,089.88 and 12,374.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,802.50 : 30,089.88 = 12,374.10 : x
2. Step 2: Convert to fraction form
   21,802.50/30,089.88 = 12,374.10/x
3. Step 3: Cross multiply
   21,802.50x = 30,089.88 × 12,374.10
4. Step 4: Simplify right side
   21,802.50x = 372,335,184.11
5. Step 5: Solve for x
   x = 372,335,184.11/21,802.50
6. Step 6: Final answer
   x = 17,077.64