Finding the Fourth Proportional to 1,243,592.72, 1,865,392.12 and 345,082.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,592.72 : 1,865,392.12 = 345,082.72 : x
2. Step 2: Convert to fraction form
   1,243,592.72/1,865,392.12 = 345,082.72/x
3. Step 3: Cross multiply
   1,243,592.72x = 1,865,392.12 × 345,082.72
4. Step 4: Simplify right side
   1,243,592.72x = 643,714,586,636.17
5. Step 5: Solve for x
   x = 643,714,586,636.17/1,243,592.72
6. Step 6: Final answer
   x = 517,624.92