Finding the Fourth Proportional to 1,059,141.36, 1,588,698.23 and 260,429.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059,141.36 : 1,588,698.23 = 260,429.83 : x
2. Step 2: Convert to fraction form
   1,059,141.36/1,588,698.23 = 260,429.83/x
3. Step 3: Cross multiply
   1,059,141.36x = 1,588,698.23 × 260,429.83
4. Step 4: Simplify right side
   1,059,141.36x = 413,744,404,686.31
5. Step 5: Solve for x
   x = 413,744,404,686.31/1,059,141.36
6. Step 6: Final answer
   x = 390,641.34