Finding the Fourth Proportional to 11,129,680, 16,689,658.56 and 3,938,824.96

Step by Step Solution

1. Step 1: Write the proportion equation
   11,129,680 : 16,689,658.56 = 3,938,824.96 : x
2. Step 2: Convert to fraction form
   11,129,680/16,689,658.56 = 3,938,824.96/x
3. Step 3: Cross multiply
   11,129,680x = 16,689,658.56 × 3,938,824.96
4. Step 4: Simplify right side
   11,129,680x = 65,737,643,710,005.66
5. Step 5: Solve for x
   x = 65,737,643,710,005.66/11,129,680
6. Step 6: Final answer
   x = 5,906,516.96