Finding the Fourth Proportional to 1,250.72, 1,876.18 and 429.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,250.72 : 1,876.18 = 429.04 : x
2. Step 2: Convert to fraction form
   1,250.72/1,876.18 = 429.04/x
3. Step 3: Cross multiply
   1,250.72x = 1,876.18 × 429.04
4. Step 4: Simplify right side
   1,250.72x = 804,956.27
5. Step 5: Solve for x
   x = 804,956.27/1,250.72
6. Step 6: Final answer
   x = 643.59