Finding the Fourth Proportional to 361,399,300.86, 498,693,491.98 and 212,711,554.56

Step by Step Solution

1. Step 1: Write the proportion equation
   361,399,300.86 : 498,693,491.98 = 212,711,554.56 : x
2. Step 2: Convert to fraction form
   361,399,300.86/498,693,491.98 = 212,711,554.56/x
3. Step 3: Cross multiply
   361,399,300.86x = 498,693,491.98 × 212,711,554.56
4. Step 4: Simplify right side
   361,399,300.86x = 106,077,867,928,020,704
5. Step 5: Solve for x
   x = 106,077,867,928,020,704/361,399,300.86
6. Step 6: Final answer
   x = 293,519,848.20