Finding the Fourth Proportional to 112,389.05, 155,104.07 and 64,641.38

Step by Step Solution

1. Step 1: Write the proportion equation
   112,389.05 : 155,104.07 = 64,641.38 : x
2. Step 2: Convert to fraction form
   112,389.05/155,104.07 = 64,641.38/x
3. Step 3: Cross multiply
   112,389.05x = 155,104.07 × 64,641.38
4. Step 4: Simplify right side
   112,389.05x = 10,026,140,029.69
5. Step 5: Solve for x
   x = 10,026,140,029.69/112,389.05
6. Step 6: Final answer
   x = 89,209.22