Finding the Third Proportional to 61,218 and 89,731.13

Step by Step Solution

1. Step 1: Write the proportion equation
   61,218 : 89,731.13 = 89,731.13 : x
2. Step 2: Convert to fraction form
   61,218/89,731.13 = 89,731.13/x
3. Step 3: Cross multiply
   61,218x = 89,731.13 × 89,731.13
4. Step 4: Simplify right side
   61,218x = 8,051,674,793.77
5. Step 5: Solve for x
   x = 8,051,674,793.77/61,218
6. Step 6: Final answer
   x = 131,524.63