Finding the Fourth Proportional to 72,798.72, 109,189.44 and 42,830.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,798.72 : 109,189.44 = 42,830.88 : x
2. Step 2: Convert to fraction form
   72,798.72/109,189.44 = 42,830.88/x
3. Step 3: Cross multiply
   72,798.72x = 109,189.44 × 42,830.88
4. Step 4: Simplify right side
   72,798.72x = 4,676,679,801.91
5. Step 5: Solve for x
   x = 4,676,679,801.91/72,798.72
6. Step 6: Final answer
   x = 64,241.24