Finding the Fourth Proportional to 428,978.05, 592,060.58 and 238,052.95

Step by Step Solution

1. Step 1: Write the proportion equation
   428,978.05 : 592,060.58 = 238,052.95 : x
2. Step 2: Convert to fraction form
   428,978.05/592,060.58 = 238,052.95/x
3. Step 3: Cross multiply
   428,978.05x = 592,060.58 × 238,052.95
4. Step 4: Simplify right side
   428,978.05x = 140,941,767,647.71
5. Step 5: Solve for x
   x = 140,941,767,647.71/428,978.05
6. Step 6: Final answer
   x = 328,552.40