Finding the Fourth Proportional to 118,488.66, 163,513.98 and 64,773.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,488.66 : 163,513.98 = 64,773.72 : x
2. Step 2: Convert to fraction form
   118,488.66/163,513.98 = 64,773.72/x
3. Step 3: Cross multiply
   118,488.66x = 163,513.98 × 64,773.72
4. Step 4: Simplify right side
   118,488.66x = 10,591,408,756.61
5. Step 5: Solve for x
   x = 10,591,408,756.61/118,488.66
6. Step 6: Final answer
   x = 89,387.53