Finding the Fourth Proportional to 117,642.78, 162,341.82 and 66,654.54

Step by Step Solution

1. Step 1: Write the proportion equation
   117,642.78 : 162,341.82 = 66,654.54 : x
2. Step 2: Convert to fraction form
   117,642.78/162,341.82 = 66,654.54/x
3. Step 3: Cross multiply
   117,642.78x = 162,341.82 × 66,654.54
4. Step 4: Simplify right side
   117,642.78x = 10,820,819,334.86
5. Step 5: Solve for x
   x = 10,820,819,334.86/117,642.78
6. Step 6: Final answer
   x = 91,980.31