Finding the Fourth Proportional to 76,798.06, 105,981.84 and 42,808.75

Step by Step Solution

1. Step 1: Write the proportion equation
   76,798.06 : 105,981.84 = 42,808.75 : x
2. Step 2: Convert to fraction form
   76,798.06/105,981.84 = 42,808.75/x
3. Step 3: Cross multiply
   76,798.06x = 105,981.84 × 42,808.75
4. Step 4: Simplify right side
   76,798.06x = 4,536,949,828.15
5. Step 5: Solve for x
   x = 4,536,949,828.15/76,798.06
6. Step 6: Final answer
   x = 59,076.36