Finding the Fourth Proportional to 1,401,852.07, 2,102,747.86 and 390,947.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401,852.07 : 2,102,747.86 = 390,947.05 : x
2. Step 2: Convert to fraction form
   1,401,852.07/2,102,747.86 = 390,947.05/x
3. Step 3: Cross multiply
   1,401,852.07x = 2,102,747.86 × 390,947.05
4. Step 4: Simplify right side
   1,401,852.07x = 822,063,072,760.81
5. Step 5: Solve for x
   x = 822,063,072,760.81/1,401,852.07
6. Step 6: Final answer
   x = 586,412.14