Finding the Fourth Proportional to 112,475.69, 155,209.07 and 64,721.33

Step by Step Solution

1. Step 1: Write the proportion equation
   112,475.69 : 155,209.07 = 64,721.33 : x
2. Step 2: Convert to fraction form
   112,475.69/155,209.07 = 64,721.33/x
3. Step 3: Cross multiply
   112,475.69x = 155,209.07 × 64,721.33
4. Step 4: Simplify right side
   112,475.69x = 10,045,337,114.86
5. Step 5: Solve for x
   x = 10,045,337,114.86/112,475.69
6. Step 6: Final answer
   x = 89,311.18