Finding the Fourth Proportional to 45,142.48, 67,706 and 13,543.92

Step by Step Solution

1. Step 1: Write the proportion equation
   45,142.48 : 67,706 = 13,543.92 : x
2. Step 2: Convert to fraction form
   45,142.48/67,706 = 13,543.92/x
3. Step 3: Cross multiply
   45,142.48x = 67,706 × 13,543.92
4. Step 4: Simplify right side
   45,142.48x = 917,004,647.52
5. Step 5: Solve for x
   x = 917,004,647.52/45,142.48
6. Step 6: Final answer
   x = 20,313.56