Finding the Fourth Proportional to 118,581.53, 163,642.55 and 64,871.51

Step by Step Solution

1. Step 1: Write the proportion equation
   118,581.53 : 163,642.55 = 64,871.51 : x
2. Step 2: Convert to fraction form
   118,581.53/163,642.55 = 64,871.51/x
3. Step 3: Cross multiply
   118,581.53x = 163,642.55 × 64,871.51
4. Step 4: Simplify right side
   118,581.53x = 10,615,738,176.18
5. Step 5: Solve for x
   x = 10,615,738,176.18/118,581.53
6. Step 6: Final answer
   x = 89,522.70