Finding the Fourth Proportional to 42,749.62, 64,131.33 and 13,167.45

Step by Step Solution

1. Step 1: Write the proportion equation
   42,749.62 : 64,131.33 = 13,167.45 : x
2. Step 2: Convert to fraction form
   42,749.62/64,131.33 = 13,167.45/x
3. Step 3: Cross multiply
   42,749.62x = 64,131.33 × 13,167.45
4. Step 4: Simplify right side
   42,749.62x = 844,445,694.71
5. Step 5: Solve for x
   x = 844,445,694.71/42,749.62
6. Step 6: Final answer
   x = 19,753.29