Finding the Fourth Proportional to 117,964, 162,790.32 and 64,972

Step by Step Solution

1. Step 1: Write the proportion equation
   117,964 : 162,790.32 = 64,972 : x
2. Step 2: Convert to fraction form
   117,964/162,790.32 = 64,972/x
3. Step 3: Cross multiply
   117,964x = 162,790.32 × 64,972
4. Step 4: Simplify right side
   117,964x = 10,576,812,671.04
5. Step 5: Solve for x
   x = 10,576,812,671.04/117,964
6. Step 6: Final answer
   x = 89,661.36