Finding the Fourth Proportional to 117,378.72, 161,980.56 and 67,076.64

Step by Step Solution

1. Step 1: Write the proportion equation
   117,378.72 : 161,980.56 = 67,076.64 : x
2. Step 2: Convert to fraction form
   117,378.72/161,980.56 = 67,076.64/x
3. Step 3: Cross multiply
   117,378.72x = 161,980.56 × 67,076.64
4. Step 4: Simplify right side
   117,378.72x = 10,865,111,710.12
5. Step 5: Solve for x
   x = 10,865,111,710.12/117,378.72
6. Step 6: Final answer
   x = 92,564.58