Finding the Fourth Proportional to 711,142.52, 1,066,714.84 and 290,418.42

Step by Step Solution

1. Step 1: Write the proportion equation
   711,142.52 : 1,066,714.84 = 290,418.42 : x
2. Step 2: Convert to fraction form
   711,142.52/1,066,714.84 = 290,418.42/x
3. Step 3: Cross multiply
   711,142.52x = 1,066,714.84 × 290,418.42
4. Step 4: Simplify right side
   711,142.52x = 309,793,638,423.35
5. Step 5: Solve for x
   x = 309,793,638,423.35/711,142.52
6. Step 6: Final answer
   x = 435,628.06