Finding the Fourth Proportional to 118,712.16, 163,824.72 and 64,996.32

Step by Step Solution

1. Step 1: Write the proportion equation
   118,712.16 : 163,824.72 = 64,996.32 : x
2. Step 2: Convert to fraction form
   118,712.16/163,824.72 = 64,996.32/x
3. Step 3: Cross multiply
   118,712.16x = 163,824.72 × 64,996.32
4. Step 4: Simplify right side
   118,712.16x = 10,648,003,925.03
5. Step 5: Solve for x
   x = 10,648,003,925.03/118,712.16
6. Step 6: Final answer
   x = 89,695.98