Finding the Fourth Proportional to 275,499.30, 384,911.70 and 275,499.30

Step by Step Solution

1. Step 1: Write the proportion equation
   275,499.30 : 384,911.70 = 275,499.30 : x
2. Step 2: Convert to fraction form
   275,499.30/384,911.70 = 275,499.30/x
3. Step 3: Cross multiply
   275,499.30x = 384,911.70 × 275,499.30
4. Step 4: Simplify right side
   275,499.30x = 106,042,903,911.81
5. Step 5: Solve for x
   x = 106,042,903,911.81/275,499.30
6. Step 6: Final answer
   x = 384,911.70