Finding the Fourth Proportional to 106,638.66, 147,138.72 and 63,606.72

Step by Step Solution

1. Step 1: Write the proportion equation
   106,638.66 : 147,138.72 = 63,606.72 : x
2. Step 2: Convert to fraction form
   106,638.66/147,138.72 = 63,606.72/x
3. Step 3: Cross multiply
   106,638.66x = 147,138.72 × 63,606.72
4. Step 4: Simplify right side
   106,638.66x = 9,359,011,364.20
5. Step 5: Solve for x
   x = 9,359,011,364.20/106,638.66
6. Step 6: Final answer
   x = 87,763.78