Finding the Fourth Proportional to 117,710.15, 162,443.21 and 63,998.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,710.15 : 162,443.21 = 63,998.78 : x
2. Step 2: Convert to fraction form
   117,710.15/162,443.21 = 63,998.78/x
3. Step 3: Cross multiply
   117,710.15x = 162,443.21 × 63,998.78
4. Step 4: Simplify right side
   117,710.15x = 10,396,166,127.07
5. Step 5: Solve for x
   x = 10,396,166,127.07/117,710.15
6. Step 6: Final answer
   x = 88,320.05