Finding the Fourth Proportional to 81,151.98, 111,990.30 and 45,343.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,151.98 : 111,990.30 = 45,343.50 : x
2. Step 2: Convert to fraction form
   81,151.98/111,990.30 = 45,343.50/x
3. Step 3: Cross multiply
   81,151.98x = 111,990.30 × 45,343.50
4. Step 4: Simplify right side
   81,151.98x = 5,078,032,168.05
5. Step 5: Solve for x
   x = 5,078,032,168.05/81,151.98
6. Step 6: Final answer
   x = 62,574.35