Finding the Fourth Proportional to 42,007.60, 62,989.52 and 19,815.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.60 : 62,989.52 = 19,815.02 : x
2. Step 2: Convert to fraction form
   42,007.60/62,989.52 = 19,815.02/x
3. Step 3: Cross multiply
   42,007.60x = 62,989.52 × 19,815.02
4. Step 4: Simplify right side
   42,007.60x = 1,248,138,598.59
5. Step 5: Solve for x
   x = 1,248,138,598.59/42,007.60
6. Step 6: Final answer
   x = 29,712.21