Finding the Fourth Proportional to 56,791.37, 78,371.03 and 31,300.10

Step by Step Solution

1. Step 1: Write the proportion equation
   56,791.37 : 78,371.03 = 31,300.10 : x
2. Step 2: Convert to fraction form
   56,791.37/78,371.03 = 31,300.10/x
3. Step 3: Cross multiply
   56,791.37x = 78,371.03 × 31,300.10
4. Step 4: Simplify right side
   56,791.37x = 2,453,020,762.50
5. Step 5: Solve for x
   x = 2,453,020,762.50/56,791.37
6. Step 6: Final answer
   x = 43,193.55