Finding the Third Proportional to 12,929,446.50 and 28,128,916.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,929,446.50 : 28,128,916.50 = 28,128,916.50 : x
2. Step 2: Convert to fraction form
   12,929,446.50/28,128,916.50 = 28,128,916.50/x
3. Step 3: Cross multiply
   12,929,446.50x = 28,128,916.50 × 28,128,916.50
4. Step 4: Simplify right side
   12,929,446.50x = 791,235,943,463,972.25
5. Step 5: Solve for x
   x = 791,235,943,463,972.25/12,929,446.50
6. Step 6: Final answer
   x = 61,196,428.13