Finding the Fourth Proportional to 19,620.56, 27,062.72 and 12,904.08

Step by Step Solution

1. Step 1: Write the proportion equation
   19,620.56 : 27,062.72 = 12,904.08 : x
2. Step 2: Convert to fraction form
   19,620.56/27,062.72 = 12,904.08/x
3. Step 3: Cross multiply
   19,620.56x = 27,062.72 × 12,904.08
4. Step 4: Simplify right side
   19,620.56x = 349,219,503.90
5. Step 5: Solve for x
   x = 349,219,503.90/19,620.56
6. Step 6: Final answer
   x = 17,798.65