Finding the Fourth Proportional to 212,109.30, 318,096.27 and 69,928.05

Step by Step Solution

1. Step 1: Write the proportion equation
   212,109.30 : 318,096.27 = 69,928.05 : x
2. Step 2: Convert to fraction form
   212,109.30/318,096.27 = 69,928.05/x
3. Step 3: Cross multiply
   212,109.30x = 318,096.27 × 69,928.05
4. Step 4: Simplify right side
   212,109.30x = 22,243,851,873.37
5. Step 5: Solve for x
   x = 22,243,851,873.37/212,109.30
6. Step 6: Final answer
   x = 104,869.76