Finding the Fourth Proportional to 42,970.76, 64,479.18 and 18,341

Step by Step Solution

1. Step 1: Write the proportion equation
   42,970.76 : 64,479.18 = 18,341 : x
2. Step 2: Convert to fraction form
   42,970.76/64,479.18 = 18,341/x
3. Step 3: Cross multiply
   42,970.76x = 64,479.18 × 18,341
4. Step 4: Simplify right side
   42,970.76x = 1,182,612,640.38
5. Step 5: Solve for x
   x = 1,182,612,640.38/42,970.76
6. Step 6: Final answer
   x = 27,521.33