Finding the Fourth Proportional to 105,603.51, 158,386.04 and 42,421.08

Step by Step Solution

1. Step 1: Write the proportion equation
   105,603.51 : 158,386.04 = 42,421.08 : x
2. Step 2: Convert to fraction form
   105,603.51/158,386.04 = 42,421.08/x
3. Step 3: Cross multiply
   105,603.51x = 158,386.04 × 42,421.08
4. Step 4: Simplify right side
   105,603.51x = 6,718,906,873.72
5. Step 5: Solve for x
   x = 6,718,906,873.72/105,603.51
6. Step 6: Final answer
   x = 63,623.90