Finding the Fourth Proportional to 118,415.82, 163,408.71 and 64,698.30

Step by Step Solution

1. Step 1: Write the proportion equation
   118,415.82 : 163,408.71 = 64,698.30 : x
2. Step 2: Convert to fraction form
   118,415.82/163,408.71 = 64,698.30/x
3. Step 3: Cross multiply
   118,415.82x = 163,408.71 × 64,698.30
4. Step 4: Simplify right side
   118,415.82x = 10,572,265,742.19
5. Step 5: Solve for x
   x = 10,572,265,742.19/118,415.82
6. Step 6: Final answer
   x = 89,280.86