Finding the Fourth Proportional to 118,533.58, 163,569.72 and 64,807.90

Step by Step Solution

1. Step 1: Write the proportion equation
   118,533.58 : 163,569.72 = 64,807.90 : x
2. Step 2: Convert to fraction form
   118,533.58/163,569.72 = 64,807.90/x
3. Step 3: Cross multiply
   118,533.58x = 163,569.72 × 64,807.90
4. Step 4: Simplify right side
   118,533.58x = 10,600,610,056.79
5. Step 5: Solve for x
   x = 10,600,610,056.79/118,533.58
6. Step 6: Final answer
   x = 89,431.28