Finding the Fourth Proportional to 990,096.24, 1,485,131.40 and 242,148.72

Step by Step Solution

1. Step 1: Write the proportion equation
   990,096.24 : 1,485,131.40 = 242,148.72 : x
2. Step 2: Convert to fraction form
   990,096.24/1,485,131.40 = 242,148.72/x
3. Step 3: Cross multiply
   990,096.24x = 1,485,131.40 × 242,148.72
4. Step 4: Simplify right side
   990,096.24x = 359,622,667,541.81
5. Step 5: Solve for x
   x = 359,622,667,541.81/990,096.24
6. Step 6: Final answer
   x = 363,219.91