Finding the Fourth Proportional to 21,667,196, 29,900,734.80 and 12,009,404

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667,196 : 29,900,734.80 = 12,009,404 : x
2. Step 2: Convert to fraction form
   21,667,196/29,900,734.80 = 12,009,404/x
3. Step 3: Cross multiply
   21,667,196x = 29,900,734.80 × 12,009,404
4. Step 4: Simplify right side
   21,667,196x = 359,090,004,110,059.19
5. Step 5: Solve for x
   x = 359,090,004,110,059.19/21,667,196
6. Step 6: Final answer
   x = 16,572,979.91