Finding the Fourth Proportional to 117,931.06, 162,742.53 and 64,216.72

Step by Step Solution

1. Step 1: Write the proportion equation
   117,931.06 : 162,742.53 = 64,216.72 : x
2. Step 2: Convert to fraction form
   117,931.06/162,742.53 = 64,216.72/x
3. Step 3: Cross multiply
   117,931.06x = 162,742.53 × 64,216.72
4. Step 4: Simplify right side
   117,931.06x = 10,450,791,481.10
5. Step 5: Solve for x
   x = 10,450,791,481.10/117,931.06
6. Step 6: Final answer
   x = 88,617.80