Finding the Fourth Proportional to 117,821.80, 162,592.50 and 64,106.20

Step by Step Solution

1. Step 1: Write the proportion equation
   117,821.80 : 162,592.50 = 64,106.20 : x
2. Step 2: Convert to fraction form
   117,821.80/162,592.50 = 64,106.20/x
3. Step 3: Cross multiply
   117,821.80x = 162,592.50 × 64,106.20
4. Step 4: Simplify right side
   117,821.80x = 10,423,187,323.50
5. Step 5: Solve for x
   x = 10,423,187,323.50/117,821.80
6. Step 6: Final answer
   x = 88,465.69