Finding the Fourth Proportional to 101,878.94, 140,585.89 and 56,553.34

Step by Step Solution

1. Step 1: Write the proportion equation
   101,878.94 : 140,585.89 = 56,553.34 : x
2. Step 2: Convert to fraction form
   101,878.94/140,585.89 = 56,553.34/x
3. Step 3: Cross multiply
   101,878.94x = 140,585.89 × 56,553.34
4. Step 4: Simplify right side
   101,878.94x = 7,950,601,650.65
5. Step 5: Solve for x
   x = 7,950,601,650.65/101,878.94
6. Step 6: Final answer
   x = 78,039.70