Finding the Fourth Proportional to 56,793.78, 78,378.84 and 31,300.09

Step by Step Solution

1. Step 1: Write the proportion equation
   56,793.78 : 78,378.84 = 31,300.09 : x
2. Step 2: Convert to fraction form
   56,793.78/78,378.84 = 31,300.09/x
3. Step 3: Cross multiply
   56,793.78x = 78,378.84 × 31,300.09
4. Step 4: Simplify right side
   56,793.78x = 2,453,264,550.15
5. Step 5: Solve for x
   x = 2,453,264,550.15/56,793.78
6. Step 6: Final answer
   x = 43,196.01