Finding the Fourth Proportional to 56,111.78, 77,768.67 and 55,062.02

Step by Step Solution

1. Step 1: Write the proportion equation
   56,111.78 : 77,768.67 = 55,062.02 : x
2. Step 2: Convert to fraction form
   56,111.78/77,768.67 = 55,062.02/x
3. Step 3: Cross multiply
   56,111.78x = 77,768.67 × 55,062.02
4. Step 4: Simplify right side
   56,111.78x = 4,282,100,062.91
5. Step 5: Solve for x
   x = 4,282,100,062.91/56,111.78
6. Step 6: Final answer
   x = 76,313.74