Finding the Fourth Proportional to 20,953.98, 28,904.22 and 13,501.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,953.98 : 28,904.22 = 13,501.98 : x
2. Step 2: Convert to fraction form
   20,953.98/28,904.22 = 13,501.98/x
3. Step 3: Cross multiply
   20,953.98x = 28,904.22 × 13,501.98
4. Step 4: Simplify right side
   20,953.98x = 390,264,200.36
5. Step 5: Solve for x
   x = 390,264,200.36/20,953.98
6. Step 6: Final answer
   x = 18,624.82