Finding the Fourth Proportional to 78,064.61, 107,728.94 and 42,254.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,064.61 : 107,728.94 = 42,254.53 : x
2. Step 2: Convert to fraction form
   78,064.61/107,728.94 = 42,254.53/x
3. Step 3: Cross multiply
   78,064.61x = 107,728.94 × 42,254.53
4. Step 4: Simplify right side
   78,064.61x = 4,552,035,325.73
5. Step 5: Solve for x
   x = 4,552,035,325.73/78,064.61
6. Step 6: Final answer
   x = 58,311.13