Finding the Fourth Proportional to 42,077.68, 63,162.69 and 21,011.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,077.68 : 63,162.69 = 21,011.81 : x
2. Step 2: Convert to fraction form
   42,077.68/63,162.69 = 21,011.81/x
3. Step 3: Cross multiply
   42,077.68x = 63,162.69 × 21,011.81
4. Step 4: Simplify right side
   42,077.68x = 1,327,162,046.76
5. Step 5: Solve for x
   x = 1,327,162,046.76/42,077.68
6. Step 6: Final answer
   x = 31,540.76