Finding the Fourth Proportional to 76,199.78, 105,154.59 and 42,208.16

Step by Step Solution

1. Step 1: Write the proportion equation
   76,199.78 : 105,154.59 = 42,208.16 : x
2. Step 2: Convert to fraction form
   76,199.78/105,154.59 = 42,208.16/x
3. Step 3: Cross multiply
   76,199.78x = 105,154.59 × 42,208.16
4. Step 4: Simplify right side
   76,199.78x = 4,438,381,759.45
5. Step 5: Solve for x
   x = 4,438,381,759.45/76,199.78
6. Step 6: Final answer
   x = 58,246.65