Finding the Fourth Proportional to 118,620.52, 163,697.70 and 64,906.60

Step by Step Solution

1. Step 1: Write the proportion equation
   118,620.52 : 163,697.70 = 64,906.60 : x
2. Step 2: Convert to fraction form
   118,620.52/163,697.70 = 64,906.60/x
3. Step 3: Cross multiply
   118,620.52x = 163,697.70 × 64,906.60
4. Step 4: Simplify right side
   118,620.52x = 10,625,061,134.82
5. Step 5: Solve for x
   x = 10,625,061,134.82/118,620.52
6. Step 6: Final answer
   x = 89,571.86