Finding the Fourth Proportional to 42,492.04, 63,738.04 and 12,909.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,492.04 : 63,738.04 = 12,909.76 : x
2. Step 2: Convert to fraction form
   42,492.04/63,738.04 = 12,909.76/x
3. Step 3: Cross multiply
   42,492.04x = 63,738.04 × 12,909.76
4. Step 4: Simplify right side
   42,492.04x = 822,842,799.27
5. Step 5: Solve for x
   x = 822,842,799.27/42,492.04
6. Step 6: Final answer
   x = 19,364.63