Finding the Fourth Proportional to 466,142.64, 642,932.72 and 345,288.96

Step by Step Solution

1. Step 1: Write the proportion equation
   466,142.64 : 642,932.72 = 345,288.96 : x
2. Step 2: Convert to fraction form
   466,142.64/642,932.72 = 345,288.96/x
3. Step 3: Cross multiply
   466,142.64x = 642,932.72 × 345,288.96
4. Step 4: Simplify right side
   466,142.64x = 221,997,570,238.77
5. Step 5: Solve for x
   x = 221,997,570,238.77/466,142.64
6. Step 6: Final answer
   x = 476,243.86