Finding the Fourth Proportional to 81,786.32, 112,864.48 and 45,488.09

Step by Step Solution

1. Step 1: Write the proportion equation
   81,786.32 : 112,864.48 = 45,488.09 : x
2. Step 2: Convert to fraction form
   81,786.32/112,864.48 = 45,488.09/x
3. Step 3: Cross multiply
   81,786.32x = 112,864.48 × 45,488.09
4. Step 4: Simplify right side
   81,786.32x = 5,133,989,792.48
5. Step 5: Solve for x
   x = 5,133,989,792.48/81,786.32
6. Step 6: Final answer
   x = 62,773.21