Finding the Fourth Proportional to 158,357,821.57, 218,456,136.61 and 137,420,467.72

Step by Step Solution

1. Step 1: Write the proportion equation
   158,357,821.57 : 218,456,136.61 = 137,420,467.72 : x
2. Step 2: Convert to fraction form
   158,357,821.57/218,456,136.61 = 137,420,467.72/x
3. Step 3: Cross multiply
   158,357,821.57x = 218,456,136.61 × 137,420,467.72
4. Step 4: Simplify right side
   158,357,821.57x = 30,020,344,468,360,724
5. Step 5: Solve for x
   x = 30,020,344,468,360,724/158,357,821.57
6. Step 6: Final answer
   x = 189,572,855.77