Finding the Fourth Proportional to 81,785.12, 112,860.50 and 45,978.46

Step by Step Solution

1. Step 1: Write the proportion equation
   81,785.12 : 112,860.50 = 45,978.46 : x
2. Step 2: Convert to fraction form
   81,785.12/112,860.50 = 45,978.46/x
3. Step 3: Cross multiply
   81,785.12x = 112,860.50 × 45,978.46
4. Step 4: Simplify right side
   81,785.12x = 5,189,151,472.79
5. Step 5: Solve for x
   x = 5,189,151,472.79/81,785.12
6. Step 6: Final answer
   x = 63,448.61