Finding the Fourth Proportional to 21,650,238.72, 29,877,326.91 and 12,948,409.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,650,238.72 : 29,877,326.91 = 12,948,409.98 : x
2. Step 2: Convert to fraction form
   21,650,238.72/29,877,326.91 = 12,948,409.98/x
3. Step 3: Cross multiply
   21,650,238.72x = 29,877,326.91 × 12,948,409.98
4. Step 4: Simplify right side
   21,650,238.72x = 386,863,877,937,166.56
5. Step 5: Solve for x
   x = 386,863,877,937,166.56/21,650,238.72
6. Step 6: Final answer
   x = 17,868,804.26