Finding the Fourth Proportional to 21,438,363.72, 29,581,611.56 and 12,736,312.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,438,363.72 : 29,581,611.56 = 12,736,312.68 : x
2. Step 2: Convert to fraction form
   21,438,363.72/29,581,611.56 = 12,736,312.68/x
3. Step 3: Cross multiply
   21,438,363.72x = 29,581,611.56 × 12,736,312.68
4. Step 4: Simplify right side
   21,438,363.72x = 376,760,654,406,462.56
5. Step 5: Solve for x
   x = 376,760,654,406,462.56/21,438,363.72
6. Step 6: Final answer
   x = 17,574,132.96