Finding the Fourth Proportional to 345,881, 477,315.78 and 186,905

Step by Step Solution

1. Step 1: Write the proportion equation
   345,881 : 477,315.78 = 186,905 : x
2. Step 2: Convert to fraction form
   345,881/477,315.78 = 186,905/x
3. Step 3: Cross multiply
   345,881x = 477,315.78 × 186,905
4. Step 4: Simplify right side
   345,881x = 89,212,705,860.90
5. Step 5: Solve for x
   x = 89,212,705,860.90/345,881
6. Step 6: Final answer
   x = 257,928.90