Finding the Fourth Proportional to 73,679.71, 110,440.88 and 42,021.61

Step by Step Solution

1. Step 1: Write the proportion equation
   73,679.71 : 110,440.88 = 42,021.61 : x
2. Step 2: Convert to fraction form
   73,679.71/110,440.88 = 42,021.61/x
3. Step 3: Cross multiply
   73,679.71x = 110,440.88 × 42,021.61
4. Step 4: Simplify right side
   73,679.71x = 4,640,903,653.41
5. Step 5: Solve for x
   x = 4,640,903,653.41/73,679.71
6. Step 6: Final answer
   x = 62,987.54