Finding the Fourth Proportional to 69,451.59, 104,235.72 and 55,688.07

Step by Step Solution

1. Step 1: Write the proportion equation
   69,451.59 : 104,235.72 = 55,688.07 : x
2. Step 2: Convert to fraction form
   69,451.59/104,235.72 = 55,688.07/x
3. Step 3: Cross multiply
   69,451.59x = 104,235.72 × 55,688.07
4. Step 4: Simplify right side
   69,451.59x = 5,804,686,071.86
5. Step 5: Solve for x
   x = 5,804,686,071.86/69,451.59
6. Step 6: Final answer
   x = 83,578.88