Finding the Fourth Proportional to 186,830.38, 257,825.55 and 105,152.05

Step by Step Solution

1. Step 1: Write the proportion equation
   186,830.38 : 257,825.55 = 105,152.05 : x
2. Step 2: Convert to fraction form
   186,830.38/257,825.55 = 105,152.05/x
3. Step 3: Cross multiply
   186,830.38x = 257,825.55 × 105,152.05
4. Step 4: Simplify right side
   186,830.38x = 27,110,885,124.88
5. Step 5: Solve for x
   x = 27,110,885,124.88/186,830.38
6. Step 6: Final answer
   x = 145,109.62