Finding the Fourth Proportional to 76,796.84, 105,970.20 and 42,797

Step by Step Solution

1. Step 1: Write the proportion equation
   76,796.84 : 105,970.20 = 42,797 : x
2. Step 2: Convert to fraction form
   76,796.84/105,970.20 = 42,797/x
3. Step 3: Cross multiply
   76,796.84x = 105,970.20 × 42,797
4. Step 4: Simplify right side
   76,796.84x = 4,535,206,649.40
5. Step 5: Solve for x
   x = 4,535,206,649.40/76,796.84
6. Step 6: Final answer
   x = 59,054.60