Finding the Fourth Proportional to 213,677,321.69, 318,719,462.88 and 194,061,170.07

Step by Step Solution

1. Step 1: Write the proportion equation
   213,677,321.69 : 318,719,462.88 = 194,061,170.07 : x
2. Step 2: Convert to fraction form
   213,677,321.69/318,719,462.88 = 194,061,170.07/x
3. Step 3: Cross multiply
   213,677,321.69x = 318,719,462.88 × 194,061,170.07
4. Step 4: Simplify right side
   213,677,321.69x = 61,851,071,891,769,928
5. Step 5: Solve for x
   x = 61,851,071,891,769,928/213,677,321.69
6. Step 6: Final answer
   x = 289,460,160.79