Finding the Fourth Proportional to 42,736.30, 64,104.59 and 13,153.95

Step by Step Solution

1. Step 1: Write the proportion equation
   42,736.30 : 64,104.59 = 13,153.95 : x
2. Step 2: Convert to fraction form
   42,736.30/64,104.59 = 13,153.95/x
3. Step 3: Cross multiply
   42,736.30x = 64,104.59 × 13,153.95
4. Step 4: Simplify right side
   42,736.30x = 843,228,604.52
5. Step 5: Solve for x
   x = 843,228,604.52/42,736.30
6. Step 6: Final answer
   x = 19,730.97