Finding the Fourth Proportional to 118,136.52, 163,023.48 and 64,420.56

Step by Step Solution

1. Step 1: Write the proportion equation
   118,136.52 : 163,023.48 = 64,420.56 : x
2. Step 2: Convert to fraction form
   118,136.52/163,023.48 = 64,420.56/x
3. Step 3: Cross multiply
   118,136.52x = 163,023.48 × 64,420.56
4. Step 4: Simplify right side
   118,136.52x = 10,502,063,874.75
5. Step 5: Solve for x
   x = 10,502,063,874.75/118,136.52
6. Step 6: Final answer
   x = 88,897.69