Finding the Third Proportional to 128,248.59 and 191,654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,248.59 : 191,654.72 = 191,654.72 : x
2. Step 2: Convert to fraction form
   128,248.59/191,654.72 = 191,654.72/x
3. Step 3: Cross multiply
   128,248.59x = 191,654.72 × 191,654.72
4. Step 4: Simplify right side
   128,248.59x = 36,731,531,219.14
5. Step 5: Solve for x
   x = 36,731,531,219.14/128,248.59
6. Step 6: Final answer
   x = 286,408.84