Finding the Fourth Proportional to 81,153.40, 111,980.56 and 45,338.96

Step by Step Solution

1. Step 1: Write the proportion equation
   81,153.40 : 111,980.56 = 45,338.96 : x
2. Step 2: Convert to fraction form
   81,153.40/111,980.56 = 45,338.96/x
3. Step 3: Cross multiply
   81,153.40x = 111,980.56 × 45,338.96
4. Step 4: Simplify right side
   81,153.40x = 5,077,082,130.62
5. Step 5: Solve for x
   x = 5,077,082,130.62/81,153.40
6. Step 6: Final answer
   x = 62,561.55