Finding the Fourth Proportional to 42,005.25, 63,009.09 and 10,840.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,005.25 : 63,009.09 = 10,840.50 : x
2. Step 2: Convert to fraction form
   42,005.25/63,009.09 = 10,840.50/x
3. Step 3: Cross multiply
   42,005.25x = 63,009.09 × 10,840.50
4. Step 4: Simplify right side
   42,005.25x = 683,050,040.15
5. Step 5: Solve for x
   x = 683,050,040.15/42,005.25
6. Step 6: Final answer
   x = 16,261.06