Finding the Fourth Proportional to 78,989.18, 118,504.52 and 28,393.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,989.18 : 118,504.52 = 28,393.34 : x
2. Step 2: Convert to fraction form
   78,989.18/118,504.52 = 28,393.34/x
3. Step 3: Cross multiply
   78,989.18x = 118,504.52 × 28,393.34
4. Step 4: Simplify right side
   78,989.18x = 3,364,739,127.90
5. Step 5: Solve for x
   x = 3,364,739,127.90/78,989.18
6. Step 6: Final answer
   x = 42,597.47