Finding the Third Proportional to 357,129 and 540,301.50

Step by Step Solution

1. Step 1: Write the proportion equation
   357,129 : 540,301.50 = 540,301.50 : x
2. Step 2: Convert to fraction form
   357,129/540,301.50 = 540,301.50/x
3. Step 3: Cross multiply
   357,129x = 540,301.50 × 540,301.50
4. Step 4: Simplify right side
   357,129x = 291,925,710,902.25
5. Step 5: Solve for x
   x = 291,925,710,902.25/357,129
6. Step 6: Final answer
   x = 817,423.71