Finding the Third Proportional to 12,791,140.31 and 19,680,749.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791,140.31 : 19,680,749.72 = 19,680,749.72 : x
2. Step 2: Convert to fraction form
   12,791,140.31/19,680,749.72 = 19,680,749.72/x
3. Step 3: Cross multiply
   12,791,140.31x = 19,680,749.72 × 19,680,749.72
4. Step 4: Simplify right side
   12,791,140.31x = 387,331,909,492,078.19
5. Step 5: Solve for x
   x = 387,331,909,492,078.19/12,791,140.31
6. Step 6: Final answer
   x = 30,281,265.00