Finding the Fourth Proportional to 117,712, 162,442.56 and 64,720

Step by Step Solution

1. Step 1: Write the proportion equation
   117,712 : 162,442.56 = 64,720 : x
2. Step 2: Convert to fraction form
   117,712/162,442.56 = 64,720/x
3. Step 3: Cross multiply
   117,712x = 162,442.56 × 64,720
4. Step 4: Simplify right side
   117,712x = 10,513,282,483.20
5. Step 5: Solve for x
   x = 10,513,282,483.20/117,712
6. Step 6: Final answer
   x = 89,313.60