Finding the Fourth Proportional to 56,556, 78,047.28 and 31,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,556 : 78,047.28 = 31,405.50 : x
2. Step 2: Convert to fraction form
   56,556/78,047.28 = 31,405.50/x
3. Step 3: Cross multiply
   56,556x = 78,047.28 × 31,405.50
4. Step 4: Simplify right side
   56,556x = 2,451,113,852.04
5. Step 5: Solve for x
   x = 2,451,113,852.04/56,556
6. Step 6: Final answer
   x = 43,339.59