Finding the Fourth Proportional to 118,577.86, 163,633.95 and 64,861.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,577.86 : 163,633.95 = 64,861.72 : x
2. Step 2: Convert to fraction form
   118,577.86/163,633.95 = 64,861.72/x
3. Step 3: Cross multiply
   118,577.86x = 163,633.95 × 64,861.72
4. Step 4: Simplify right side
   118,577.86x = 10,613,579,447.39
5. Step 5: Solve for x
   x = 10,613,579,447.39/118,577.86
6. Step 6: Final answer
   x = 89,507.26