Finding the Fourth Proportional to 118,380.09, 163,368.45 and 64,670.10

Step by Step Solution

1. Step 1: Write the proportion equation
   118,380.09 : 163,368.45 = 64,670.10 : x
2. Step 2: Convert to fraction form
   118,380.09/163,368.45 = 64,670.10/x
3. Step 3: Cross multiply
   118,380.09x = 163,368.45 × 64,670.10
4. Step 4: Simplify right side
   118,380.09x = 10,565,053,998.35
5. Step 5: Solve for x
   x = 10,565,053,998.35/118,380.09
6. Step 6: Final answer
   x = 89,246.88