Finding the Fourth Proportional to 78,109.11, 107,789.94 and 42,299.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109.11 : 107,789.94 = 42,299.01 : x
2. Step 2: Convert to fraction form
   78,109.11/107,789.94 = 42,299.01/x
3. Step 3: Cross multiply
   78,109.11x = 107,789.94 × 42,299.01
4. Step 4: Simplify right side
   78,109.11x = 4,559,407,749.96
5. Step 5: Solve for x
   x = 4,559,407,749.96/78,109.11
6. Step 6: Final answer
   x = 58,372.29