Finding the Fourth Proportional to 117,931.31, 162,742.88 and 64,216.97

Step by Step Solution

1. Step 1: Write the proportion equation
   117,931.31 : 162,742.88 = 64,216.97 : x
2. Step 2: Convert to fraction form
   117,931.31/162,742.88 = 64,216.97/x
3. Step 3: Cross multiply
   117,931.31x = 162,742.88 × 64,216.97
4. Step 4: Simplify right side
   117,931.31x = 10,450,854,321.59
5. Step 5: Solve for x
   x = 10,450,854,321.59/117,931.31
6. Step 6: Final answer
   x = 88,618.15