Finding the Fourth Proportional to 742,080.69, 1,113,167.81 and 209,642.78

Step by Step Solution

1. Step 1: Write the proportion equation
   742,080.69 : 1,113,167.81 = 209,642.78 : x
2. Step 2: Convert to fraction form
   742,080.69/1,113,167.81 = 209,642.78/x
3. Step 3: Cross multiply
   742,080.69x = 1,113,167.81 × 209,642.78
4. Step 4: Simplify right side
   742,080.69x = 233,367,597,601.94
5. Step 5: Solve for x
   x = 233,367,597,601.94/742,080.69
6. Step 6: Final answer
   x = 314,477.39