Finding the Fourth Proportional to 117,389.55, 161,993.20 and 63,672.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,389.55 : 161,993.20 = 63,672.78 : x
2. Step 2: Convert to fraction form
   117,389.55/161,993.20 = 63,672.78/x
3. Step 3: Cross multiply
   117,389.55x = 161,993.20 × 63,672.78
4. Step 4: Simplify right side
   117,389.55x = 10,314,557,066.73
5. Step 5: Solve for x
   x = 10,314,557,066.73/117,389.55
6. Step 6: Final answer
   x = 87,866.06