Finding the Fourth Proportional to 1,401,096.36, 2,101,646.59 and 390,221.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401,096.36 : 2,101,646.59 = 390,221.22 : x
2. Step 2: Convert to fraction form
   1,401,096.36/2,101,646.59 = 390,221.22/x
3. Step 3: Cross multiply
   1,401,096.36x = 2,101,646.59 × 390,221.22
4. Step 4: Simplify right side
   1,401,096.36x = 820,107,091,442.50
5. Step 5: Solve for x
   x = 820,107,091,442.50/1,401,096.36
6. Step 6: Final answer
   x = 585,332.40