Finding the Fourth Proportional to 216,978,016.75, 299,432,386.33 and 117,860,419.31

Step by Step Solution

1. Step 1: Write the proportion equation
   216,978,016.75 : 299,432,386.33 = 117,860,419.31 : x
2. Step 2: Convert to fraction form
   216,978,016.75/299,432,386.33 = 117,860,419.31/x
3. Step 3: Cross multiply
   216,978,016.75x = 299,432,386.33 × 117,860,419.31
4. Step 4: Simplify right side
   216,978,016.75x = 35,291,226,606,055,900
5. Step 5: Solve for x
   x = 35,291,226,606,055,900/216,978,016.75
6. Step 6: Final answer
   x = 162,648,857.87