Finding the Fourth Proportional to 78,212.39, 107,933.01 and 42,402.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,212.39 : 107,933.01 = 42,402.08 : x
2. Step 2: Convert to fraction form
   78,212.39/107,933.01 = 42,402.08/x
3. Step 3: Cross multiply
   78,212.39x = 107,933.01 × 42,402.08
4. Step 4: Simplify right side
   78,212.39x = 4,576,584,235.49
5. Step 5: Solve for x
   x = 4,576,584,235.49/78,212.39
6. Step 6: Final answer
   x = 58,514.83