Finding the Fourth Proportional to 1,241,111.89, 1,861,774.89 and 342,553.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,241,111.89 : 1,861,774.89 = 342,553.63 : x
2. Step 2: Convert to fraction form
   1,241,111.89/1,861,774.89 = 342,553.63/x
3. Step 3: Cross multiply
   1,241,111.89x = 1,861,774.89 × 342,553.63
4. Step 4: Simplify right side
   1,241,111.89x = 637,757,746,812.35
5. Step 5: Solve for x
   x = 637,757,746,812.35/1,241,111.89
6. Step 6: Final answer
   x = 513,859.99