Finding the Fourth Proportional to 81,153.48, 111,989.50 and 45,343.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,153.48 : 111,989.50 = 45,343.50 : x
2. Step 2: Convert to fraction form
   81,153.48/111,989.50 = 45,343.50/x
3. Step 3: Cross multiply
   81,153.48x = 111,989.50 × 45,343.50
4. Step 4: Simplify right side
   81,153.48x = 5,077,995,893.25
5. Step 5: Solve for x
   x = 5,077,995,893.25/81,153.48
6. Step 6: Final answer
   x = 62,572.74