Finding the Fourth Proportional to 152,722,421.18, 210,862,383.06 and 142,965,164.42

Step by Step Solution

1. Step 1: Write the proportion equation
   152,722,421.18 : 210,862,383.06 = 142,965,164.42 : x
2. Step 2: Convert to fraction form
   152,722,421.18/210,862,383.06 = 142,965,164.42/x
3. Step 3: Cross multiply
   152,722,421.18x = 210,862,383.06 × 142,965,164.42
4. Step 4: Simplify right side
   152,722,421.18x = 30,145,975,263,111,608
5. Step 5: Solve for x
   x = 30,145,975,263,111,608/152,722,421.18
6. Step 6: Final answer
   x = 197,390,632.18