Finding the Fourth Proportional to 78,623.69, 108,497.43 and 42,813.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,623.69 : 108,497.43 = 42,813.59 : x
2. Step 2: Convert to fraction form
   78,623.69/108,497.43 = 42,813.59/x
3. Step 3: Cross multiply
   78,623.69x = 108,497.43 × 42,813.59
4. Step 4: Simplify right side
   78,623.69x = 4,645,163,941.59
5. Step 5: Solve for x
   x = 4,645,163,941.59/78,623.69
6. Step 6: Final answer
   x = 59,080.97