Finding the Fourth Proportional to 213,297,429.18, 319,665,225.50 and 90,323,582.55

Step by Step Solution

1. Step 1: Write the proportion equation
   213,297,429.18 : 319,665,225.50 = 90,323,582.55 : x
2. Step 2: Convert to fraction form
   213,297,429.18/319,665,225.50 = 90,323,582.55/x
3. Step 3: Cross multiply
   213,297,429.18x = 319,665,225.50 × 90,323,582.55
4. Step 4: Simplify right side
   213,297,429.18x = 28,873,308,383,813,616
5. Step 5: Solve for x
   x = 28,873,308,383,813,616/213,297,429.18
6. Step 6: Final answer
   x = 135,366,415.31