Finding the Fourth Proportional to 112,711.67, 155,556.50 and 64,965.35

Step by Step Solution

1. Step 1: Write the proportion equation
   112,711.67 : 155,556.50 = 64,965.35 : x
2. Step 2: Convert to fraction form
   112,711.67/155,556.50 = 64,965.35/x
3. Step 3: Cross multiply
   112,711.67x = 155,556.50 × 64,965.35
4. Step 4: Simplify right side
   112,711.67x = 10,105,782,531.34
5. Step 5: Solve for x
   x = 10,105,782,531.34/112,711.67
6. Step 6: Final answer
   x = 89,660.48