Finding the Fourth Proportional to 69,068.16, 103,485.60 and 55,188

Step by Step Solution

1. Step 1: Write the proportion equation
   69,068.16 : 103,485.60 = 55,188 : x
2. Step 2: Convert to fraction form
   69,068.16/103,485.60 = 55,188/x
3. Step 3: Cross multiply
   69,068.16x = 103,485.60 × 55,188
4. Step 4: Simplify right side
   69,068.16x = 5,711,163,292.80
5. Step 5: Solve for x
   x = 5,711,163,292.80/69,068.16
6. Step 6: Final answer
   x = 82,688.80