Finding the Fourth Proportional to 118,617, 163,693.54 and 64,906.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,617 : 163,693.54 = 64,906.72 : x
2. Step 2: Convert to fraction form
   118,617/163,693.54 = 64,906.72/x
3. Step 3: Cross multiply
   118,617x = 163,693.54 × 64,906.72
4. Step 4: Simplify right side
   118,617x = 10,624,810,766.59
5. Step 5: Solve for x
   x = 10,624,810,766.59/118,617
6. Step 6: Final answer
   x = 89,572.41