Finding the Fourth Proportional to 1,402.89, 2,104.27 and 429.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.89 : 2,104.27 = 429.00 : x
2. Step 2: Convert to fraction form
   1,402.89/2,104.27 = 429.00/x
3. Step 3: Cross multiply
   1,402.89x = 2,104.27 × 429.00
4. Step 4: Simplify right side
   1,402.89x = 902,722.26
5. Step 5: Solve for x
   x = 902,722.26/1,402.89
6. Step 6: Final answer
   x = 643.47