Finding the Fourth Proportional to 120,748.32, 166,665.60 and 78,304.32

Step by Step Solution

1. Step 1: Write the proportion equation
   120,748.32 : 166,665.60 = 78,304.32 : x
2. Step 2: Convert to fraction form
   120,748.32/166,665.60 = 78,304.32/x
3. Step 3: Cross multiply
   120,748.32x = 166,665.60 × 78,304.32
4. Step 4: Simplify right side
   120,748.32x = 13,050,636,475.39
5. Step 5: Solve for x
   x = 13,050,636,475.39/120,748.32
6. Step 6: Final answer
   x = 108,081.31