Finding the Fourth Proportional to 117,986.08, 162,820.72 and 64,994.08

Step by Step Solution

1. Step 1: Write the proportion equation
   117,986.08 : 162,820.72 = 64,994.08 : x
2. Step 2: Convert to fraction form
   117,986.08/162,820.72 = 64,994.08/x
3. Step 3: Cross multiply
   117,986.08x = 162,820.72 × 64,994.08
4. Step 4: Simplify right side
   117,986.08x = 10,582,382,901.34
5. Step 5: Solve for x
   x = 10,582,382,901.34/117,986.08
6. Step 6: Final answer
   x = 89,691.79