Finding the Fourth Proportional to 242,980,516.72, 335,312,896.35 and 137,156,206.76

Step by Step Solution

1. Step 1: Write the proportion equation
   242,980,516.72 : 335,312,896.35 = 137,156,206.76 : x
2. Step 2: Convert to fraction form
   242,980,516.72/335,312,896.35 = 137,156,206.76/x
3. Step 3: Cross multiply
   242,980,516.72x = 335,312,896.35 × 137,156,206.76
4. Step 4: Simplify right side
   242,980,516.72x = 45,990,244,941,075,048
5. Step 5: Solve for x
   x = 45,990,244,941,075,048/242,980,516.72
6. Step 6: Final answer
   x = 189,275,442.99