Finding the Fourth Proportional to 118,414.70, 163,412.43 and 64,699.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,414.70 : 163,412.43 = 64,699.72 : x
2. Step 2: Convert to fraction form
   118,414.70/163,412.43 = 64,699.72/x
3. Step 3: Cross multiply
   118,414.70x = 163,412.43 × 64,699.72
4. Step 4: Simplify right side
   118,414.70x = 10,572,738,606.01
5. Step 5: Solve for x
   x = 10,572,738,606.01/118,414.70
6. Step 6: Final answer
   x = 89,285.69