Finding the Fourth Proportional to 20,870.01, 28,796.36 and 12,368.39

Step by Step Solution

1. Step 1: Write the proportion equation
   20,870.01 : 28,796.36 = 12,368.39 : x
2. Step 2: Convert to fraction form
   20,870.01/28,796.36 = 12,368.39/x
3. Step 3: Cross multiply
   20,870.01x = 28,796.36 × 12,368.39
4. Step 4: Simplify right side
   20,870.01x = 356,164,569.99
5. Step 5: Solve for x
   x = 356,164,569.99/20,870.01
6. Step 6: Final answer
   x = 17,065.86