Finding the Fourth Proportional to 21,798.56, 30,081.10 and 12,368.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,798.56 : 30,081.10 = 12,368.88 : x
2. Step 2: Convert to fraction form
   21,798.56/30,081.10 = 12,368.88/x
3. Step 3: Cross multiply
   21,798.56x = 30,081.10 × 12,368.88
4. Step 4: Simplify right side
   21,798.56x = 372,069,516.17
5. Step 5: Solve for x
   x = 372,069,516.17/21,798.56
6. Step 6: Final answer
   x = 17,068.54