Finding the Fourth Proportional to 39,980.84, 55,175.72 and 22,075.79

Step by Step Solution

1. Step 1: Write the proportion equation
   39,980.84 : 55,175.72 = 22,075.79 : x
2. Step 2: Convert to fraction form
   39,980.84/55,175.72 = 22,075.79/x
3. Step 3: Cross multiply
   39,980.84x = 55,175.72 × 22,075.79
4. Step 4: Simplify right side
   39,980.84x = 1,218,047,221.56
5. Step 5: Solve for x
   x = 1,218,047,221.56/39,980.84
6. Step 6: Final answer
   x = 30,465.78