Finding the Fourth Proportional to 291,061.05, 436,591.59 and 80,698.99

Step by Step Solution

1. Step 1: Write the proportion equation
   291,061.05 : 436,591.59 = 80,698.99 : x
2. Step 2: Convert to fraction form
   291,061.05/436,591.59 = 80,698.99/x
3. Step 3: Cross multiply
   291,061.05x = 436,591.59 × 80,698.99
4. Step 4: Simplify right side
   291,061.05x = 35,232,500,355.49
5. Step 5: Solve for x
   x = 35,232,500,355.49/291,061.05
6. Step 6: Final answer
   x = 121,048.49