Finding the Fourth Proportional to 72,296.12, 99,769.15 and 42,099.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72,296.12 : 99,769.15 = 42,099.05 : x
2. Step 2: Convert to fraction form
   72,296.12/99,769.15 = 42,099.05/x
3. Step 3: Cross multiply
   72,296.12x = 99,769.15 × 42,099.05
4. Step 4: Simplify right side
   72,296.12x = 4,200,186,736.35
5. Step 5: Solve for x
   x = 4,200,186,736.35/72,296.12
6. Step 6: Final answer
   x = 58,096.98