Finding the Fourth Proportional to 78,499.94, 108,328.79 and 42,690.24

Step by Step Solution

1. Step 1: Write the proportion equation
   78,499.94 : 108,328.79 = 42,690.24 : x
2. Step 2: Convert to fraction form
   78,499.94/108,328.79 = 42,690.24/x
3. Step 3: Cross multiply
   78,499.94x = 108,328.79 × 42,690.24
4. Step 4: Simplify right side
   78,499.94x = 4,624,582,150.74
5. Step 5: Solve for x
   x = 4,624,582,150.74/78,499.94
6. Step 6: Final answer
   x = 58,911.92