Finding the Fourth Proportional to 118,412.19, 163,406.89 and 64,696.05

Step by Step Solution

1. Step 1: Write the proportion equation
   118,412.19 : 163,406.89 = 64,696.05 : x
2. Step 2: Convert to fraction form
   118,412.19/163,406.89 = 64,696.05/x
3. Step 3: Cross multiply
   118,412.19x = 163,406.89 × 64,696.05
4. Step 4: Simplify right side
   118,412.19x = 10,571,780,164.04
5. Step 5: Solve for x
   x = 10,571,780,164.04/118,412.19
6. Step 6: Final answer
   x = 89,279.49