Finding the Fourth Proportional to 158,357,823.56, 218,456,139.36 and 137,420,469.72

Step by Step Solution

1. Step 1: Write the proportion equation
   158,357,823.56 : 218,456,139.36 = 137,420,469.72 : x
2. Step 2: Convert to fraction form
   158,357,823.56/218,456,139.36 = 137,420,469.72/x
3. Step 3: Cross multiply
   158,357,823.56x = 218,456,139.36 × 137,420,469.72
4. Step 4: Simplify right side
   158,357,823.56x = 30,020,345,284,068,980
5. Step 5: Solve for x
   x = 30,020,345,284,068,980/158,357,823.56
6. Step 6: Final answer
   x = 189,572,858.54