Finding the Fourth Proportional to 1,287,103.50, 1,769,904.27 and 1,117,042.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,103.50 : 1,769,904.27 = 1,117,042.38 : x
2. Step 2: Convert to fraction form
   1,287,103.50/1,769,904.27 = 1,117,042.38/x
3. Step 3: Cross multiply
   1,287,103.50x = 1,769,904.27 × 1,117,042.38
4. Step 4: Simplify right side
   1,287,103.50x = 1,977,058,078,132.96
5. Step 5: Solve for x
   x = 1,977,058,078,132.96/1,287,103.50
6. Step 6: Final answer
   x = 1,536,052.13