Finding the Fourth Proportional to 118,410.72, 163,409.94 and 64,695.30

Step by Step Solution

1. Step 1: Write the proportion equation
   118,410.72 : 163,409.94 = 64,695.30 : x
2. Step 2: Convert to fraction form
   118,410.72/163,409.94 = 64,695.30/x
3. Step 3: Cross multiply
   118,410.72x = 163,409.94 × 64,695.30
4. Step 4: Simplify right side
   118,410.72x = 10,571,855,091.28
5. Step 5: Solve for x
   x = 10,571,855,091.28/118,410.72
6. Step 6: Final answer
   x = 89,281.23