Finding the Fourth Proportional to 76,284.76, 105,283.86 and 42,300.80

Step by Step Solution

1. Step 1: Write the proportion equation
   76,284.76 : 105,283.86 = 42,300.80 : x
2. Step 2: Convert to fraction form
   76,284.76/105,283.86 = 42,300.80/x
3. Step 3: Cross multiply
   76,284.76x = 105,283.86 × 42,300.80
4. Step 4: Simplify right side
   76,284.76x = 4,453,591,926.93
5. Step 5: Solve for x
   x = 4,453,591,926.93/76,284.76
6. Step 6: Final answer
   x = 58,381.15