Finding the Fourth Proportional to 429,039.60, 592,077.24 and 238,056.72

Step by Step Solution

1. Step 1: Write the proportion equation
   429,039.60 : 592,077.24 = 238,056.72 : x
2. Step 2: Convert to fraction form
   429,039.60/592,077.24 = 238,056.72/x
3. Step 3: Cross multiply
   429,039.60x = 592,077.24 × 238,056.72
4. Step 4: Simplify right side
   429,039.60x = 140,947,965,741.05
5. Step 5: Solve for x
   x = 140,947,965,741.05/429,039.60
6. Step 6: Final answer
   x = 328,519.71