Finding the Third Proportional to 286,230 and 420,592.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,230 : 420,592.50 = 420,592.50 : x
2. Step 2: Convert to fraction form
   286,230/420,592.50 = 420,592.50/x
3. Step 3: Cross multiply
   286,230x = 420,592.50 × 420,592.50
4. Step 4: Simplify right side
   286,230x = 176,898,051,056.25
5. Step 5: Solve for x
   x = 176,898,051,056.25/286,230
6. Step 6: Final answer
   x = 618,027.64