Finding the Fourth Proportional to 72,700.62, 109,056.12 and 19,392.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72,700.62 : 109,056.12 = 19,392.30 : x
2. Step 2: Convert to fraction form
   72,700.62/109,056.12 = 19,392.30/x
3. Step 3: Cross multiply
   72,700.62x = 109,056.12 × 19,392.30
4. Step 4: Simplify right side
   72,700.62x = 2,114,848,995.88
5. Step 5: Solve for x
   x = 2,114,848,995.88/72,700.62
6. Step 6: Final answer
   x = 29,089.83