Finding the Fourth Proportional to 23,123,149.60, 31,911,906 and 12,813,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,123,149.60 : 31,911,906 = 12,813,106.72 : x
2. Step 2: Convert to fraction form
   23,123,149.60/31,911,906 = 12,813,106.72/x
3. Step 3: Cross multiply
   23,123,149.60x = 31,911,906 × 12,813,106.72
4. Step 4: Simplify right side
   23,123,149.60x = 408,890,657,216,608.31
5. Step 5: Solve for x
   x = 408,890,657,216,608.31/23,123,149.60
6. Step 6: Final answer
   x = 17,683,173.11