Finding the Third Proportional to 19,780.31 and 43,312.45

Step by Step Solution

1. Step 1: Write the proportion equation
   19,780.31 : 43,312.45 = 43,312.45 : x
2. Step 2: Convert to fraction form
   19,780.31/43,312.45 = 43,312.45/x
3. Step 3: Cross multiply
   19,780.31x = 43,312.45 × 43,312.45
4. Step 4: Simplify right side
   19,780.31x = 1,875,968,421.23
5. Step 5: Solve for x
   x = 1,875,968,421.23/19,780.31
6. Step 6: Final answer
   x = 94,840.19