Finding the Fourth Proportional to 249,113,499.10, 343,787,072.76 and 143,266,997.05

Step by Step Solution

1. Step 1: Write the proportion equation
   249,113,499.10 : 343,787,072.76 = 143,266,997.05 : x
2. Step 2: Convert to fraction form
   249,113,499.10/343,787,072.76 = 143,266,997.05/x
3. Step 3: Cross multiply
   249,113,499.10x = 343,787,072.76 × 143,266,997.05
4. Step 4: Simplify right side
   249,113,499.10x = 49,253,341,538,935,056
5. Step 5: Solve for x
   x = 49,253,341,538,935,056/249,113,499.10
6. Step 6: Final answer
   x = 197,714,462.35