Finding the Fourth Proportional to 56,355.50, 77,770.59 and 31,205

Step by Step Solution

1. Step 1: Write the proportion equation
   56,355.50 : 77,770.59 = 31,205 : x
2. Step 2: Convert to fraction form
   56,355.50/77,770.59 = 31,205/x
3. Step 3: Cross multiply
   56,355.50x = 77,770.59 × 31,205
4. Step 4: Simplify right side
   56,355.50x = 2,426,831,260.95
5. Step 5: Solve for x
   x = 2,426,831,260.95/56,355.50
6. Step 6: Final answer
   x = 43,062.90