Finding the Fourth Proportional to 78,019.84, 107,667.33 and 42,209.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,019.84 : 107,667.33 = 42,209.86 : x
2. Step 2: Convert to fraction form
   78,019.84/107,667.33 = 42,209.86/x
3. Step 3: Cross multiply
   78,019.84x = 107,667.33 × 42,209.86
4. Step 4: Simplify right side
   78,019.84x = 4,544,622,925.87
5. Step 5: Solve for x
   x = 4,544,622,925.87/78,019.84
6. Step 6: Final answer
   x = 58,249.58