Finding the Fourth Proportional to 652,816.86, 978,511.05 and 279,061.98

Step by Step Solution

1. Step 1: Write the proportion equation
   652,816.86 : 978,511.05 = 279,061.98 : x
2. Step 2: Convert to fraction form
   652,816.86/978,511.05 = 279,061.98/x
3. Step 3: Cross multiply
   652,816.86x = 978,511.05 × 279,061.98
4. Step 4: Simplify right side
   652,816.86x = 273,065,231,064.88
5. Step 5: Solve for x
   x = 273,065,231,064.88/652,816.86
6. Step 6: Final answer
   x = 418,287.65