Finding the Fourth Proportional to 78,802.91, 108,744.22 and 42,990.79

Step by Step Solution

1. Step 1: Write the proportion equation
   78,802.91 : 108,744.22 = 42,990.79 : x
2. Step 2: Convert to fraction form
   78,802.91/108,744.22 = 42,990.79/x
3. Step 3: Cross multiply
   78,802.91x = 108,744.22 × 42,990.79
4. Step 4: Simplify right side
   78,802.91x = 4,674,999,925.73
5. Step 5: Solve for x
   x = 4,674,999,925.73/78,802.91
6. Step 6: Final answer
   x = 59,325.22