Finding the Fourth Proportional to 118,317.15, 163,281.03 and 64,605.57

Step by Step Solution

1. Step 1: Write the proportion equation
   118,317.15 : 163,281.03 = 64,605.57 : x
2. Step 2: Convert to fraction form
   118,317.15/163,281.03 = 64,605.57/x
3. Step 3: Cross multiply
   118,317.15x = 163,281.03 × 64,605.57
4. Step 4: Simplify right side
   118,317.15x = 10,548,864,013.34
5. Step 5: Solve for x
   x = 10,548,864,013.34/118,317.15
6. Step 6: Final answer
   x = 89,157.52