Finding the Fourth Proportional to 213,677,311.78, 318,719,448.15 and 194,061,160.17

Step by Step Solution

1. Step 1: Write the proportion equation
   213,677,311.78 : 318,719,448.15 = 194,061,160.17 : x
2. Step 2: Convert to fraction form
   213,677,311.78/318,719,448.15 = 194,061,160.17/x
3. Step 3: Cross multiply
   213,677,311.78x = 318,719,448.15 × 194,061,160.17
4. Step 4: Simplify right side
   213,677,311.78x = 61,851,065,876,731,152
5. Step 5: Solve for x
   x = 61,851,065,876,731,152/213,677,311.78
6. Step 6: Final answer
   x = 289,460,146.06