Finding the Fourth Proportional to 39,899.57, 55,061.58 and 21,994.19

Step by Step Solution

1. Step 1: Write the proportion equation
   39,899.57 : 55,061.58 = 21,994.19 : x
2. Step 2: Convert to fraction form
   39,899.57/55,061.58 = 21,994.19/x
3. Step 3: Cross multiply
   39,899.57x = 55,061.58 × 21,994.19
4. Step 4: Simplify right side
   39,899.57x = 1,211,034,852.22
5. Step 5: Solve for x
   x = 1,211,034,852.22/39,899.57
6. Step 6: Final answer
   x = 30,352.08