Finding the Fourth Proportional to 116,731.53, 161,087.31 and 71,406.18

Step by Step Solution

1. Step 1: Write the proportion equation
   116,731.53 : 161,087.31 = 71,406.18 : x
2. Step 2: Convert to fraction form
   116,731.53/161,087.31 = 71,406.18/x
3. Step 3: Cross multiply
   116,731.53x = 161,087.31 × 71,406.18
4. Step 4: Simplify right side
   116,731.53x = 11,502,629,453.58
5. Step 5: Solve for x
   x = 11,502,629,453.58/116,731.53
6. Step 6: Final answer
   x = 98,539.18