Finding the Fourth Proportional to 118,971.72, 164,181.20 and 65,257.18

Step by Step Solution

1. Step 1: Write the proportion equation
   118,971.72 : 164,181.20 = 65,257.18 : x
2. Step 2: Convert to fraction form
   118,971.72/164,181.20 = 65,257.18/x
3. Step 3: Cross multiply
   118,971.72x = 164,181.20 × 65,257.18
4. Step 4: Simplify right side
   118,971.72x = 10,714,001,384.28
5. Step 5: Solve for x
   x = 10,714,001,384.28/118,971.72
6. Step 6: Final answer
   x = 90,055.03