Finding the Fourth Proportional to 368,854,085.43, 509,019,133.91 and 212,218,050.83

Step by Step Solution

1. Step 1: Write the proportion equation
   368,854,085.43 : 509,019,133.91 = 212,218,050.83 : x
2. Step 2: Convert to fraction form
   368,854,085.43/509,019,133.91 = 212,218,050.83/x
3. Step 3: Cross multiply
   368,854,085.43x = 509,019,133.91 × 212,218,050.83
4. Step 4: Simplify right side
   368,854,085.43x = 108,023,048,429,948,752
5. Step 5: Solve for x
   x = 108,023,048,429,948,752/368,854,085.43
6. Step 6: Final answer
   x = 292,861,195.52