Finding the Fourth Proportional to 492,196.10, 689,541.10 and 492,196.10

Step by Step Solution

1. Step 1: Write the proportion equation
   492,196.10 : 689,541.10 = 492,196.10 : x
2. Step 2: Convert to fraction form
   492,196.10/689,541.10 = 492,196.10/x
3. Step 3: Cross multiply
   492,196.10x = 689,541.10 × 492,196.10
4. Step 4: Simplify right side
   492,196.10x = 339,389,440,209.71
5. Step 5: Solve for x
   x = 339,389,440,209.71/492,196.10
6. Step 6: Final answer
   x = 689,541.10