Finding the Fourth Proportional to 692,638.34, 1,039,061.40 and 243,280

Step by Step Solution

1. Step 1: Write the proportion equation
   692,638.34 : 1,039,061.40 = 243,280 : x
2. Step 2: Convert to fraction form
   692,638.34/1,039,061.40 = 243,280/x
3. Step 3: Cross multiply
   692,638.34x = 1,039,061.40 × 243,280
4. Step 4: Simplify right side
   692,638.34x = 252,782,857,392
5. Step 5: Solve for x
   x = 252,782,857,392/692,638.34
6. Step 6: Final answer
   x = 364,956.49