Finding the Fourth Proportional to 76,650.10, 105,747.78 and 56,554.93

Step by Step Solution

1. Step 1: Write the proportion equation
   76,650.10 : 105,747.78 = 56,554.93 : x
2. Step 2: Convert to fraction form
   76,650.10/105,747.78 = 56,554.93/x
3. Step 3: Cross multiply
   76,650.10x = 105,747.78 × 56,554.93
4. Step 4: Simplify right side
   76,650.10x = 5,980,558,295.56
5. Step 5: Solve for x
   x = 5,980,558,295.56/76,650.10
6. Step 6: Final answer
   x = 78,024.14