Finding the Fourth Proportional to 692,881.76, 1,039,667.16 and 389,087.12

Step by Step Solution

1. Step 1: Write the proportion equation
   692,881.76 : 1,039,667.16 = 389,087.12 : x
2. Step 2: Convert to fraction form
   692,881.76/1,039,667.16 = 389,087.12/x
3. Step 3: Cross multiply
   692,881.76x = 1,039,667.16 × 389,087.12
4. Step 4: Simplify right side
   692,881.76x = 404,521,101,042.98
5. Step 5: Solve for x
   x = 404,521,101,042.98/692,881.76
6. Step 6: Final answer
   x = 583,824.14