Finding the Fourth Proportional to 112,321.54, 155,011.89 and 64,589.86

Step by Step Solution

1. Step 1: Write the proportion equation
   112,321.54 : 155,011.89 = 64,589.86 : x
2. Step 2: Convert to fraction form
   112,321.54/155,011.89 = 64,589.86/x
3. Step 3: Cross multiply
   112,321.54x = 155,011.89 × 64,589.86
4. Step 4: Simplify right side
   112,321.54x = 10,012,196,273.44
5. Step 5: Solve for x
   x = 10,012,196,273.44/112,321.54
6. Step 6: Final answer
   x = 89,138.70