Finding the Fourth Proportional to 118,399.01, 163,390.03 and 64,687.10

Step by Step Solution

1. Step 1: Write the proportion equation
   118,399.01 : 163,390.03 = 64,687.10 : x
2. Step 2: Convert to fraction form
   118,399.01/163,390.03 = 64,687.10/x
3. Step 3: Cross multiply
   118,399.01x = 163,390.03 × 64,687.10
4. Step 4: Simplify right side
   118,399.01x = 10,569,226,230.95
5. Step 5: Solve for x
   x = 10,569,226,230.95/118,399.01
6. Step 6: Final answer
   x = 89,267.86