Finding the Fourth Proportional to 78,015.94, 107,661.85 and 42,205.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,015.94 : 107,661.85 = 42,205.98 : x
2. Step 2: Convert to fraction form
   78,015.94/107,661.85 = 42,205.98/x
3. Step 3: Cross multiply
   78,015.94x = 107,661.85 × 42,205.98
4. Step 4: Simplify right side
   78,015.94x = 4,543,973,887.86
5. Step 5: Solve for x
   x = 4,543,973,887.86/78,015.94
6. Step 6: Final answer
   x = 58,244.17