Finding the Fourth Proportional to 78,790.05, 108,731.84 and 42,981.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,790.05 : 108,731.84 = 42,981.03 : x
2. Step 2: Convert to fraction form
   78,790.05/108,731.84 = 42,981.03/x
3. Step 3: Cross multiply
   78,790.05x = 108,731.84 × 42,981.03
4. Step 4: Simplify right side
   78,790.05x = 4,673,406,262.09
5. Step 5: Solve for x
   x = 4,673,406,262.09/78,790.05
6. Step 6: Final answer
   x = 59,314.68