Finding the Fourth Proportional to 118,646.18, 163,729.54 and 64,930.12

Step by Step Solution

1. Step 1: Write the proportion equation
   118,646.18 : 163,729.54 = 64,930.12 : x
2. Step 2: Convert to fraction form
   118,646.18/163,729.54 = 64,930.12/x
3. Step 3: Cross multiply
   118,646.18x = 163,729.54 × 64,930.12
4. Step 4: Simplify right side
   118,646.18x = 10,630,978,679.74
5. Step 5: Solve for x
   x = 10,630,978,679.74/118,646.18
6. Step 6: Final answer
   x = 89,602.37