Finding the Fourth Proportional to 118,134.45, 163,022.58 and 64,420.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,134.45 : 163,022.58 = 64,420.50 : x
2. Step 2: Convert to fraction form
   118,134.45/163,022.58 = 64,420.50/x
3. Step 3: Cross multiply
   118,134.45x = 163,022.58 × 64,420.50
4. Step 4: Simplify right side
   118,134.45x = 10,501,996,114.89
5. Step 5: Solve for x
   x = 10,501,996,114.89/118,134.45
6. Step 6: Final answer
   x = 88,898.68