Finding the Fourth Proportional to 78,071.38, 107,738.51 and 42,261.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,071.38 : 107,738.51 = 42,261.68 : x
2. Step 2: Convert to fraction form
   78,071.38/107,738.51 = 42,261.68/x
3. Step 3: Cross multiply
   78,071.38x = 107,738.51 × 42,261.68
4. Step 4: Simplify right side
   78,071.38x = 4,553,210,491.33
5. Step 5: Solve for x
   x = 4,553,210,491.33/78,071.38
6. Step 6: Final answer
   x = 58,321.12