Finding the Fourth Proportional to 315,259,867.62, 435,056,019.72 and 172,205,748.96

Step by Step Solution

1. Step 1: Write the proportion equation
   315,259,867.62 : 435,056,019.72 = 172,205,748.96 : x
2. Step 2: Convert to fraction form
   315,259,867.62/435,056,019.72 = 172,205,748.96/x
3. Step 3: Cross multiply
   315,259,867.62x = 435,056,019.72 × 172,205,748.96
4. Step 4: Simplify right side
   315,259,867.62x = 74,919,147,715,439,136
5. Step 5: Solve for x
   x = 74,919,147,715,439,136/315,259,867.62
6. Step 6: Final answer
   x = 237,642,514.67