Finding the Third Proportional to 152,985 and 215,055.75

Step by Step Solution

1. Step 1: Write the proportion equation
   152,985 : 215,055.75 = 215,055.75 : x
2. Step 2: Convert to fraction form
   152,985/215,055.75 = 215,055.75/x
3. Step 3: Cross multiply
   152,985x = 215,055.75 × 215,055.75
4. Step 4: Simplify right side
   152,985x = 46,248,975,608.06
5. Step 5: Solve for x
   x = 46,248,975,608.06/152,985
6. Step 6: Final answer
   x = 302,310.52