Finding the Fourth Proportional to 385,155,922.52, 531,470,332.73 and 215,619,443.98

Step by Step Solution

1. Step 1: Write the proportion equation
   385,155,922.52 : 531,470,332.73 = 215,619,443.98 : x
2. Step 2: Convert to fraction form
   385,155,922.52/531,470,332.73 = 215,619,443.98/x
3. Step 3: Cross multiply
   385,155,922.52x = 531,470,332.73 × 215,619,443.98
4. Step 4: Simplify right side
   385,155,922.52x = 114,595,337,634,318,560
5. Step 5: Solve for x
   x = 114,595,337,634,318,560/385,155,922.52
6. Step 6: Final answer
   x = 297,529,730.00