Finding the Fourth Proportional to 81,115.43, 111,928.23 and 45,300.87

Step by Step Solution

1. Step 1: Write the proportion equation
   81,115.43 : 111,928.23 = 45,300.87 : x
2. Step 2: Convert to fraction form
   81,115.43/111,928.23 = 45,300.87/x
3. Step 3: Cross multiply
   81,115.43x = 111,928.23 × 45,300.87
4. Step 4: Simplify right side
   81,115.43x = 5,070,446,196.56
5. Step 5: Solve for x
   x = 5,070,446,196.56/81,115.43
6. Step 6: Final answer
   x = 62,509.03