Finding the Fourth Proportional to 101,278.69, 139,764.62 and 56,566.69

Step by Step Solution

1. Step 1: Write the proportion equation
   101,278.69 : 139,764.62 = 56,566.69 : x
2. Step 2: Convert to fraction form
   101,278.69/139,764.62 = 56,566.69/x
3. Step 3: Cross multiply
   101,278.69x = 139,764.62 × 56,566.69
4. Step 4: Simplify right side
   101,278.69x = 7,906,021,724.51
5. Step 5: Solve for x
   x = 7,906,021,724.51/101,278.69
6. Step 6: Final answer
   x = 78,062.05