Finding the Fourth Proportional to 21,003,312.38, 31,462,945.34 and 16,692,636.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,003,312.38 : 31,462,945.34 = 16,692,636.96 : x
2. Step 2: Convert to fraction form
   21,003,312.38/31,462,945.34 = 16,692,636.96/x
3. Step 3: Cross multiply
   21,003,312.38x = 31,462,945.34 × 16,692,636.96
4. Step 4: Simplify right side
   21,003,312.38x = 525,199,524,252,943.81
5. Step 5: Solve for x
   x = 525,199,524,252,943.81/21,003,312.38
6. Step 6: Final answer
   x = 25,005,556.97