Finding the Fourth Proportional to 21,458,442.01, 29,613,428.72 and 12,292,856.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,458,442.01 : 29,613,428.72 = 12,292,856.23 : x
2. Step 2: Convert to fraction form
   21,458,442.01/29,613,428.72 = 12,292,856.23/x
3. Step 3: Cross multiply
   21,458,442.01x = 29,613,428.72 × 12,292,856.23
4. Step 4: Simplify right side
   21,458,442.01x = 364,033,621,732,312.94
5. Step 5: Solve for x
   x = 364,033,621,732,312.94/21,458,442.01
6. Step 6: Final answer
   x = 16,964,587.72