Finding the Fourth Proportional to 78,064.70, 107,728.98 and 42,255.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,064.70 : 107,728.98 = 42,255.32 : x
2. Step 2: Convert to fraction form
   78,064.70/107,728.98 = 42,255.32/x
3. Step 3: Cross multiply
   78,064.70x = 107,728.98 × 42,255.32
4. Step 4: Simplify right side
   78,064.70x = 4,552,122,523.17
5. Step 5: Solve for x
   x = 4,552,122,523.17/78,064.70
6. Step 6: Final answer
   x = 58,312.18