Finding the Fourth Proportional to 42,835.20, 64,245.12 and 11,667.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,835.20 : 64,245.12 = 11,667.84 : x
2. Step 2: Convert to fraction form
   42,835.20/64,245.12 = 11,667.84/x
3. Step 3: Cross multiply
   42,835.20x = 64,245.12 × 11,667.84
4. Step 4: Simplify right side
   42,835.20x = 749,601,780.94
5. Step 5: Solve for x
   x = 749,601,780.94/42,835.20
6. Step 6: Final answer
   x = 17,499.67