Finding the Fourth Proportional to 78,870.09, 118,116.54 and 45,488.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,870.09 : 118,116.54 = 45,488.96 : x
2. Step 2: Convert to fraction form
   78,870.09/118,116.54 = 45,488.96/x
3. Step 3: Cross multiply
   78,870.09x = 118,116.54 × 45,488.96
4. Step 4: Simplify right side
   78,870.09x = 5,372,997,745.37
5. Step 5: Solve for x
   x = 5,372,997,745.37/78,870.09
6. Step 6: Final answer
   x = 68,124.66