Finding the Fourth Proportional to 72,319.38, 99,814.56 and 42,109.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,319.38 : 99,814.56 = 42,109.34 : x
2. Step 2: Convert to fraction form
   72,319.38/99,814.56 = 42,109.34/x
3. Step 3: Cross multiply
   72,319.38x = 99,814.56 × 42,109.34
4. Step 4: Simplify right side
   72,319.38x = 4,203,125,243.99
5. Step 5: Solve for x
   x = 4,203,125,243.99/72,319.38
6. Step 6: Final answer
   x = 58,118.93