Finding the Fourth Proportional to 550,871.69, 760,216.52 and 309,172.68

Step by Step Solution

1. Step 1: Write the proportion equation
   550,871.69 : 760,216.52 = 309,172.68 : x
2. Step 2: Convert to fraction form
   550,871.69/760,216.52 = 309,172.68/x
3. Step 3: Cross multiply
   550,871.69x = 760,216.52 × 309,172.68
4. Step 4: Simplify right side
   550,871.69x = 235,038,179,641.61
5. Step 5: Solve for x
   x = 235,038,179,641.61/550,871.69
6. Step 6: Final answer
   x = 426,665.93