Finding the Fourth Proportional to 118,301.90, 163,256.18 and 64,586.30

Step by Step Solution

1. Step 1: Write the proportion equation
   118,301.90 : 163,256.18 = 64,586.30 : x
2. Step 2: Convert to fraction form
   118,301.90/163,256.18 = 64,586.30/x
3. Step 3: Cross multiply
   118,301.90x = 163,256.18 × 64,586.30
4. Step 4: Simplify right side
   118,301.90x = 10,544,111,479.12
5. Step 5: Solve for x
   x = 10,544,111,479.12/118,301.90
6. Step 6: Final answer
   x = 89,128.85