Finding the Fourth Proportional to 1,142,859.43, 1,576,826.76 and 900,390.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142,859.43 : 1,576,826.76 = 900,390.52 : x
2. Step 2: Convert to fraction form
   1,142,859.43/1,576,826.76 = 900,390.52/x
3. Step 3: Cross multiply
   1,142,859.43x = 1,576,826.76 × 900,390.52
4. Step 4: Simplify right side
   1,142,859.43x = 1,419,759,866,386.32
5. Step 5: Solve for x
   x = 1,419,759,866,386.32/1,142,859.43
6. Step 6: Final answer
   x = 1,242,287.40