Finding the Fourth Proportional to 128,086.60, 176,758.82 and 74,384.81

Step by Step Solution

1. Step 1: Write the proportion equation
   128,086.60 : 176,758.82 = 74,384.81 : x
2. Step 2: Convert to fraction form
   128,086.60/176,758.82 = 74,384.81/x
3. Step 3: Cross multiply
   128,086.60x = 176,758.82 × 74,384.81
4. Step 4: Simplify right side
   128,086.60x = 13,148,171,241.52
5. Step 5: Solve for x
   x = 13,148,171,241.52/128,086.60
6. Step 6: Final answer
   x = 102,650.64