Finding the Third Proportional to 391,667.63 and 528,451.88

Step by Step Solution

1. Step 1: Write the proportion equation
   391,667.63 : 528,451.88 = 528,451.88 : x
2. Step 2: Convert to fraction form
   391,667.63/528,451.88 = 528,451.88/x
3. Step 3: Cross multiply
   391,667.63x = 528,451.88 × 528,451.88
4. Step 4: Simplify right side
   391,667.63x = 279,261,384,191.02
5. Step 5: Solve for x
   x = 279,261,384,191.02/391,667.63
6. Step 6: Final answer
   x = 713,006.04