Finding the Fourth Proportional to 78,032.72, 107,684.39 and 42,221.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,032.72 : 107,684.39 = 42,221.94 : x
2. Step 2: Convert to fraction form
   78,032.72/107,684.39 = 42,221.94/x
3. Step 3: Cross multiply
   78,032.72x = 107,684.39 × 42,221.94
4. Step 4: Simplify right side
   78,032.72x = 4,546,643,642.41
5. Step 5: Solve for x
   x = 4,546,643,642.41/78,032.72
6. Step 6: Final answer
   x = 58,265.87