Finding the Fourth Proportional to 429,783.28, 644,803.71 and 173,483.89

Step by Step Solution

1. Step 1: Write the proportion equation
   429,783.28 : 644,803.71 = 173,483.89 : x
2. Step 2: Convert to fraction form
   429,783.28/644,803.71 = 173,483.89/x
3. Step 3: Cross multiply
   429,783.28x = 644,803.71 × 173,483.89
4. Step 4: Simplify right side
   429,783.28x = 111,863,055,897.23
5. Step 5: Solve for x
   x = 111,863,055,897.23/429,783.28
6. Step 6: Final answer
   x = 260,277.82