Finding the Fourth Proportional to 42,348, 63,499.20 and 14,258.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,348 : 63,499.20 = 14,258.70 : x
2. Step 2: Convert to fraction form
   42,348/63,499.20 = 14,258.70/x
3. Step 3: Cross multiply
   42,348x = 63,499.20 × 14,258.70
4. Step 4: Simplify right side
   42,348x = 905,416,043.04
5. Step 5: Solve for x
   x = 905,416,043.04/42,348
6. Step 6: Final answer
   x = 21,380.37