Finding the Fourth Proportional to 111,669.16, 167,355.96 and 81,947.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111,669.16 : 167,355.96 = 81,947.56 : x
2. Step 2: Convert to fraction form
   111,669.16/167,355.96 = 81,947.56/x
3. Step 3: Cross multiply
   111,669.16x = 167,355.96 × 81,947.56
4. Step 4: Simplify right side
   111,669.16x = 13,714,412,573.46
5. Step 5: Solve for x
   x = 13,714,412,573.46/111,669.16
6. Step 6: Final answer
   x = 122,812.89