Finding the Fourth Proportional to 81,789.56, 112,860.98 and 45,485.12

Step by Step Solution

1. Step 1: Write the proportion equation
   81,789.56 : 112,860.98 = 45,485.12 : x
2. Step 2: Convert to fraction form
   81,789.56/112,860.98 = 45,485.12/x
3. Step 3: Cross multiply
   81,789.56x = 112,860.98 × 45,485.12
4. Step 4: Simplify right side
   81,789.56x = 5,133,495,273.34
5. Step 5: Solve for x
   x = 5,133,495,273.34/81,789.56
6. Step 6: Final answer
   x = 62,764.68