Finding the Fourth Proportional to 42,150.21, 63,260.79 and 21,083.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,150.21 : 63,260.79 = 21,083.94 : x
2. Step 2: Convert to fraction form
   42,150.21/63,260.79 = 21,083.94/x
3. Step 3: Cross multiply
   42,150.21x = 63,260.79 × 21,083.94
4. Step 4: Simplify right side
   42,150.21x = 1,333,786,700.71
5. Step 5: Solve for x
   x = 1,333,786,700.71/42,150.21
6. Step 6: Final answer
   x = 31,643.65