Finding the Fourth Proportional to 112,709.56, 155,503.92 and 64,956.38

Step by Step Solution

1. Step 1: Write the proportion equation
   112,709.56 : 155,503.92 = 64,956.38 : x
2. Step 2: Convert to fraction form
   112,709.56/155,503.92 = 64,956.38/x
3. Step 3: Cross multiply
   112,709.56x = 155,503.92 × 64,956.38
4. Step 4: Simplify right side
   112,709.56x = 10,100,971,719.01
5. Step 5: Solve for x
   x = 10,100,971,719.01/112,709.56
6. Step 6: Final answer
   x = 89,619.48