Finding the Fourth Proportional to 117,984, 162,817.92 and 64,992

Step by Step Solution

1. Step 1: Write the proportion equation
   117,984 : 162,817.92 = 64,992 : x
2. Step 2: Convert to fraction form
   117,984/162,817.92 = 64,992/x
3. Step 3: Cross multiply
   117,984x = 162,817.92 × 64,992
4. Step 4: Simplify right side
   117,984x = 10,581,862,256.64
5. Step 5: Solve for x
   x = 10,581,862,256.64/117,984
6. Step 6: Final answer
   x = 89,688.96