Finding the Fourth Proportional to 78,790.42, 108,731.10 and 42,981.22

Step by Step Solution

1. Step 1: Write the proportion equation
   78,790.42 : 108,731.10 = 42,981.22 : x
2. Step 2: Convert to fraction form
   78,790.42/108,731.10 = 42,981.22/x
3. Step 3: Cross multiply
   78,790.42x = 108,731.10 × 42,981.22
4. Step 4: Simplify right side
   78,790.42x = 4,673,395,329.94
5. Step 5: Solve for x
   x = 4,673,395,329.94/78,790.42
6. Step 6: Final answer
   x = 59,314.26