Finding the Fourth Proportional to 78,908.31, 118,407.33 and 28,981.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,908.31 : 118,407.33 = 28,981.98 : x
2. Step 2: Convert to fraction form
   78,908.31/118,407.33 = 28,981.98/x
3. Step 3: Cross multiply
   78,908.31x = 118,407.33 × 28,981.98
4. Step 4: Simplify right side
   78,908.31x = 3,431,678,869.91
5. Step 5: Solve for x
   x = 3,431,678,869.91/78,908.31
6. Step 6: Final answer
   x = 43,489.45