Finding the Fourth Proportional to 118,612.47, 163,683.75 and 64,896.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,612.47 : 163,683.75 = 64,896.72 : x
2. Step 2: Convert to fraction form
   118,612.47/163,683.75 = 64,896.72/x
3. Step 3: Cross multiply
   118,612.47x = 163,683.75 × 64,896.72
4. Step 4: Simplify right side
   118,612.47x = 10,622,538,492.30
5. Step 5: Solve for x
   x = 10,622,538,492.30/118,612.47
6. Step 6: Final answer
   x = 89,556.68