Finding the Fourth Proportional to 758,939.40, 1,139,179.42 and 380,131.56

Step by Step Solution

1. Step 1: Write the proportion equation
   758,939.40 : 1,139,179.42 = 380,131.56 : x
2. Step 2: Convert to fraction form
   758,939.40/1,139,179.42 = 380,131.56/x
3. Step 3: Cross multiply
   758,939.40x = 1,139,179.42 × 380,131.56
4. Step 4: Simplify right side
   758,939.40x = 433,038,050,044.50
5. Step 5: Solve for x
   x = 433,038,050,044.50/758,939.40
6. Step 6: Final answer
   x = 570,583.17