Finding the Fourth Proportional to 81,878.96, 112,991.42 and 45,580.16

Step by Step Solution

1. Step 1: Write the proportion equation
   81,878.96 : 112,991.42 = 45,580.16 : x
2. Step 2: Convert to fraction form
   81,878.96/112,991.42 = 45,580.16/x
3. Step 3: Cross multiply
   81,878.96x = 112,991.42 × 45,580.16
4. Step 4: Simplify right side
   81,878.96x = 5,150,167,002.23
5. Step 5: Solve for x
   x = 5,150,167,002.23/81,878.96
6. Step 6: Final answer
   x = 62,899.76