Finding the Fourth Proportional to 429,528.37, 592,762.71 and 257,389.60

Step by Step Solution

1. Step 1: Write the proportion equation
   429,528.37 : 592,762.71 = 257,389.60 : x
2. Step 2: Convert to fraction form
   429,528.37/592,762.71 = 257,389.60/x
3. Step 3: Cross multiply
   429,528.37x = 592,762.71 × 257,389.60
4. Step 4: Simplify right side
   429,528.37x = 152,570,956,821.82
5. Step 5: Solve for x
   x = 152,570,956,821.82/429,528.37
6. Step 6: Final answer
   x = 355,205.77