Finding the Fourth Proportional to 118,404.22, 163,397.95 and 64,690.12

Step by Step Solution

1. Step 1: Write the proportion equation
   118,404.22 : 163,397.95 = 64,690.12 : x
2. Step 2: Convert to fraction form
   118,404.22/163,397.95 = 64,690.12/x
3. Step 3: Cross multiply
   118,404.22x = 163,397.95 × 64,690.12
4. Step 4: Simplify right side
   118,404.22x = 10,570,232,993.25
5. Step 5: Solve for x
   x = 10,570,232,993.25/118,404.22
6. Step 6: Final answer
   x = 89,272.43