Finding the Fourth Proportional to 42,912.83, 64,378.52 and 17,612.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,912.83 : 64,378.52 = 17,612.40 : x
2. Step 2: Convert to fraction form
   42,912.83/64,378.52 = 17,612.40/x
3. Step 3: Cross multiply
   42,912.83x = 64,378.52 × 17,612.40
4. Step 4: Simplify right side
   42,912.83x = 1,133,860,157.59
5. Step 5: Solve for x
   x = 1,133,860,157.59/42,912.83
6. Step 6: Final answer
   x = 26,422.41