Finding the Fourth Proportional to 310,373,448.38, 428,155,068.72 and 192,854,128.58

Step by Step Solution

1. Step 1: Write the proportion equation
   310,373,448.38 : 428,155,068.72 = 192,854,128.58 : x
2. Step 2: Convert to fraction form
   310,373,448.38/428,155,068.72 = 192,854,128.58/x
3. Step 3: Cross multiply
   310,373,448.38x = 428,155,068.72 × 192,854,128.58
4. Step 4: Simplify right side
   310,373,448.38x = 82,571,472,675,105,632
5. Step 5: Solve for x
   x = 82,571,472,675,105,632/310,373,448.38
6. Step 6: Final answer
   x = 266,039,099.37