Finding the Fourth Proportional to 81,151.77, 111,987.34 and 45,342.02

Step by Step Solution

1. Step 1: Write the proportion equation
   81,151.77 : 111,987.34 = 45,342.02 : x
2. Step 2: Convert to fraction form
   81,151.77/111,987.34 = 45,342.02/x
3. Step 3: Cross multiply
   81,151.77x = 111,987.34 × 45,342.02
4. Step 4: Simplify right side
   81,151.77x = 5,077,732,210.03
5. Step 5: Solve for x
   x = 5,077,732,210.03/81,151.77
6. Step 6: Final answer
   x = 62,570.81