Finding the Fourth Proportional to 2,105,389.82, 2,905,438.16 and 1,138,520.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105,389.82 : 2,905,438.16 = 1,138,520.31 : x
2. Step 2: Convert to fraction form
   2,105,389.82/2,905,438.16 = 1,138,520.31/x
3. Step 3: Cross multiply
   2,105,389.82x = 2,905,438.16 × 1,138,520.31
4. Step 4: Simplify right side
   2,105,389.82x = 3,307,900,340,155.76
5. Step 5: Solve for x
   x = 3,307,900,340,155.76/2,105,389.82
6. Step 6: Final answer
   x = 1,571,158.14