Finding the Fourth Proportional to 12,641,178.10, 17,438,398.98 and 7,678,298.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,641,178.10 : 17,438,398.98 = 7,678,298.78 : x
2. Step 2: Convert to fraction form
   12,641,178.10/17,438,398.98 = 7,678,298.78/x
3. Step 3: Cross multiply
   12,641,178.10x = 17,438,398.98 × 7,678,298.78
4. Step 4: Simplify right side
   12,641,178.10x = 133,897,237,613,287.25
5. Step 5: Solve for x
   x = 133,897,237,613,287.25/12,641,178.10
6. Step 6: Final answer
   x = 10,592,148.66