Finding the Fourth Proportional to 89,389.60, 134,113.53 and 42,636.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,389.60 : 134,113.53 = 42,636.40 : x
2. Step 2: Convert to fraction form
   89,389.60/134,113.53 = 42,636.40/x
3. Step 3: Cross multiply
   89,389.60x = 134,113.53 × 42,636.40
4. Step 4: Simplify right side
   89,389.60x = 5,718,118,110.49
5. Step 5: Solve for x
   x = 5,718,118,110.49/89,389.60
6. Step 6: Final answer
   x = 63,968.49