Finding the Fourth Proportional to 612,199.01, 918,300.72 and 185,738.49

Step by Step Solution

1. Step 1: Write the proportion equation
   612,199.01 : 918,300.72 = 185,738.49 : x
2. Step 2: Convert to fraction form
   612,199.01/918,300.72 = 185,738.49/x
3. Step 3: Cross multiply
   612,199.01x = 918,300.72 × 185,738.49
4. Step 4: Simplify right side
   612,199.01x = 170,563,791,855.56
5. Step 5: Solve for x
   x = 170,563,791,855.56/612,199.01
6. Step 6: Final answer
   x = 278,608.41