Finding the Fourth Proportional to 117,689.90, 162,415.22 and 63,978.52

Step by Step Solution

1. Step 1: Write the proportion equation
   117,689.90 : 162,415.22 = 63,978.52 : x
2. Step 2: Convert to fraction form
   117,689.90/162,415.22 = 63,978.52/x
3. Step 3: Cross multiply
   117,689.90x = 162,415.22 × 63,978.52
4. Step 4: Simplify right side
   117,689.90x = 10,391,085,401.07
5. Step 5: Solve for x
   x = 10,391,085,401.07/117,689.90
6. Step 6: Final answer
   x = 88,292.07