Finding the Fourth Proportional to 42,664.52, 64,000.20 and 11,499.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,664.52 : 64,000.20 = 11,499.32 : x
2. Step 2: Convert to fraction form
   42,664.52/64,000.20 = 11,499.32/x
3. Step 3: Cross multiply
   42,664.52x = 64,000.20 × 11,499.32
4. Step 4: Simplify right side
   42,664.52x = 735,958,779.86
5. Step 5: Solve for x
   x = 735,958,779.86/42,664.52
6. Step 6: Final answer
   x = 17,249.90