Finding the Fourth Proportional to 105,888.72, 146,131.20 and 63,446.34

Step by Step Solution

1. Step 1: Write the proportion equation
   105,888.72 : 146,131.20 = 63,446.34 : x
2. Step 2: Convert to fraction form
   105,888.72/146,131.20 = 63,446.34/x
3. Step 3: Cross multiply
   105,888.72x = 146,131.20 × 63,446.34
4. Step 4: Simplify right side
   105,888.72x = 9,271,489,799.81
5. Step 5: Solve for x
   x = 9,271,489,799.81/105,888.72
6. Step 6: Final answer
   x = 87,558.81