Finding the Fourth Proportional to 429,012.72, 592,065.36 and 238,047.12

Step by Step Solution

1. Step 1: Write the proportion equation
   429,012.72 : 592,065.36 = 238,047.12 : x
2. Step 2: Convert to fraction form
   429,012.72/592,065.36 = 238,047.12/x
3. Step 3: Cross multiply
   429,012.72x = 592,065.36 × 238,047.12
4. Step 4: Simplify right side
   429,012.72x = 140,939,453,799.76
5. Step 5: Solve for x
   x = 140,939,453,799.76/429,012.72
6. Step 6: Final answer
   x = 328,520.45