Finding the Fourth Proportional to 42,932.40, 64,422.96 and 16,638.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,932.40 : 64,422.96 = 16,638.96 : x
2. Step 2: Convert to fraction form
   42,932.40/64,422.96 = 16,638.96/x
3. Step 3: Cross multiply
   42,932.40x = 64,422.96 × 16,638.96
4. Step 4: Simplify right side
   42,932.40x = 1,071,931,054.52
5. Step 5: Solve for x
   x = 1,071,931,054.52/42,932.40
6. Step 6: Final answer
   x = 24,967.88