Finding the Fourth Proportional to 118,631.59, 163,711.56 and 64,916.58

Step by Step Solution

1. Step 1: Write the proportion equation
   118,631.59 : 163,711.56 = 64,916.58 : x
2. Step 2: Convert to fraction form
   118,631.59/163,711.56 = 64,916.58/x
3. Step 3: Cross multiply
   118,631.59x = 163,711.56 × 64,916.58
4. Step 4: Simplify right side
   118,631.59x = 10,627,595,439.02
5. Step 5: Solve for x
   x = 10,627,595,439.02/118,631.59
6. Step 6: Final answer
   x = 89,584.87