Finding the Fourth Proportional to 40,919.16, 61,298.58 and 21,210.72

Step by Step Solution

1. Step 1: Write the proportion equation
   40,919.16 : 61,298.58 = 21,210.72 : x
2. Step 2: Convert to fraction form
   40,919.16/61,298.58 = 21,210.72/x
3. Step 3: Cross multiply
   40,919.16x = 61,298.58 × 21,210.72
4. Step 4: Simplify right side
   40,919.16x = 1,300,187,016.78
5. Step 5: Solve for x
   x = 1,300,187,016.78/40,919.16
6. Step 6: Final answer
   x = 31,774.53