Finding the Fourth Proportional to 42,795.08, 64,169.12 and 13,204.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,795.08 : 64,169.12 = 13,204.72 : x
2. Step 2: Convert to fraction form
   42,795.08/64,169.12 = 13,204.72/x
3. Step 3: Cross multiply
   42,795.08x = 64,169.12 × 13,204.72
4. Step 4: Simplify right side
   42,795.08x = 847,335,262.25
5. Step 5: Solve for x
   x = 847,335,262.25/42,795.08
6. Step 6: Final answer
   x = 19,799.83