Finding the Fourth Proportional to 78,200.06, 117,300.06 and 67,638.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,200.06 : 117,300.06 = 67,638.69 : x
2. Step 2: Convert to fraction form
   78,200.06/117,300.06 = 67,638.69/x
3. Step 3: Cross multiply
   78,200.06x = 117,300.06 × 67,638.69
4. Step 4: Simplify right side
   78,200.06x = 7,934,022,395.32
5. Step 5: Solve for x
   x = 7,934,022,395.32/78,200.06
6. Step 6: Final answer
   x = 101,458.02