Finding the Fourth Proportional to 231,663, 319,692.78 and 131,061

Step by Step Solution

1. Step 1: Write the proportion equation
   231,663 : 319,692.78 = 131,061 : x
2. Step 2: Convert to fraction form
   231,663/319,692.78 = 131,061/x
3. Step 3: Cross multiply
   231,663x = 319,692.78 × 131,061
4. Step 4: Simplify right side
   231,663x = 41,899,255,439.58
5. Step 5: Solve for x
   x = 41,899,255,439.58/231,663
6. Step 6: Final answer
   x = 180,862.96