Finding the Fourth Proportional to 102,060.45, 140,845.77 and 56,736.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,060.45 : 140,845.77 = 56,736.72 : x
2. Step 2: Convert to fraction form
   102,060.45/140,845.77 = 56,736.72/x
3. Step 3: Cross multiply
   102,060.45x = 140,845.77 × 56,736.72
4. Step 4: Simplify right side
   102,060.45x = 7,991,127,015.67
5. Step 5: Solve for x
   x = 7,991,127,015.67/102,060.45
6. Step 6: Final answer
   x = 78,297.98