Finding the Fourth Proportional to 118,136.18, 163,031.87 and 64,424.14

Step by Step Solution

1. Step 1: Write the proportion equation
   118,136.18 : 163,031.87 = 64,424.14 : x
2. Step 2: Convert to fraction form
   118,136.18/163,031.87 = 64,424.14/x
3. Step 3: Cross multiply
   118,136.18x = 163,031.87 × 64,424.14
4. Step 4: Simplify right side
   118,136.18x = 10,503,188,017.34
5. Step 5: Solve for x
   x = 10,503,188,017.34/118,136.18
6. Step 6: Final answer
   x = 88,907.46