Finding the Fourth Proportional to 45,872, 68,819.56 and 13,040

Step by Step Solution

1. Step 1: Write the proportion equation
   45,872 : 68,819.56 = 13,040 : x
2. Step 2: Convert to fraction form
   45,872/68,819.56 = 13,040/x
3. Step 3: Cross multiply
   45,872x = 68,819.56 × 13,040
4. Step 4: Simplify right side
   45,872x = 897,407,062.40
5. Step 5: Solve for x
   x = 897,407,062.40/45,872
6. Step 6: Final answer
   x = 19,563.29