Finding the Fourth Proportional to 118,317.34, 163,278.42 and 64,603.54

Step by Step Solution

1. Step 1: Write the proportion equation
   118,317.34 : 163,278.42 = 64,603.54 : x
2. Step 2: Convert to fraction form
   118,317.34/163,278.42 = 64,603.54/x
3. Step 3: Cross multiply
   118,317.34x = 163,278.42 × 64,603.54
4. Step 4: Simplify right side
   118,317.34x = 10,548,363,937.61
5. Step 5: Solve for x
   x = 10,548,363,937.61/118,317.34
6. Step 6: Final answer
   x = 89,153.15