Finding the Fourth Proportional to 1,066,513.70, 1,599,613.18 and 392,438.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066,513.70 : 1,599,613.18 = 392,438.39 : x
2. Step 2: Convert to fraction form
   1,066,513.70/1,599,613.18 = 392,438.39/x
3. Step 3: Cross multiply
   1,066,513.70x = 1,599,613.18 × 392,438.39
4. Step 4: Simplify right side
   1,066,513.70x = 627,749,612,002.82
5. Step 5: Solve for x
   x = 627,749,612,002.82/1,066,513.70
6. Step 6: Final answer
   x = 588,599.67