Finding the Fourth Proportional to 76,272, 105,255.36 and 42,748.80

Step by Step Solution

1. Step 1: Write the proportion equation
   76,272 : 105,255.36 = 42,748.80 : x
2. Step 2: Convert to fraction form
   76,272/105,255.36 = 42,748.80/x
3. Step 3: Cross multiply
   76,272x = 105,255.36 × 42,748.80
4. Step 4: Simplify right side
   76,272x = 4,499,540,333.57
5. Step 5: Solve for x
   x = 4,499,540,333.57/76,272
6. Step 6: Final answer
   x = 58,993.34