Finding the Fourth Proportional to 860,123.61, 1,289,463.71 and 380,273.94

Step by Step Solution

1. Step 1: Write the proportion equation
   860,123.61 : 1,289,463.71 = 380,273.94 : x
2. Step 2: Convert to fraction form
   860,123.61/1,289,463.71 = 380,273.94/x
3. Step 3: Cross multiply
   860,123.61x = 1,289,463.71 × 380,273.94
4. Step 4: Simplify right side
   860,123.61x = 490,349,443,587.35
5. Step 5: Solve for x
   x = 490,349,443,587.35/860,123.61
6. Step 6: Final answer
   x = 570,091.83