Finding the Fourth Proportional to 120,077.21, 165,707.06 and 65,630.48

Step by Step Solution

1. Step 1: Write the proportion equation
   120,077.21 : 165,707.06 = 65,630.48 : x
2. Step 2: Convert to fraction form
   120,077.21/165,707.06 = 65,630.48/x
3. Step 3: Cross multiply
   120,077.21x = 165,707.06 × 65,630.48
4. Step 4: Simplify right side
   120,077.21x = 10,875,432,730.50
5. Step 5: Solve for x
   x = 10,875,432,730.50/120,077.21
6. Step 6: Final answer
   x = 90,570.33