Finding the Fourth Proportional to 271,978.20, 407,870.77 and 79,798.99

Step by Step Solution

1. Step 1: Write the proportion equation
   271,978.20 : 407,870.77 = 79,798.99 : x
2. Step 2: Convert to fraction form
   271,978.20/407,870.77 = 79,798.99/x
3. Step 3: Cross multiply
   271,978.20x = 407,870.77 × 79,798.99
4. Step 4: Simplify right side
   271,978.20x = 32,547,675,496.52
5. Step 5: Solve for x
   x = 32,547,675,496.52/271,978.20
6. Step 6: Final answer
   x = 119,670.16