Finding the Fourth Proportional to 666,019.98, 919,088.91 and 364,207.50

Step by Step Solution

1. Step 1: Write the proportion equation
   666,019.98 : 919,088.91 = 364,207.50 : x
2. Step 2: Convert to fraction form
   666,019.98/919,088.91 = 364,207.50/x
3. Step 3: Cross multiply
   666,019.98x = 919,088.91 × 364,207.50
4. Step 4: Simplify right side
   666,019.98x = 334,739,074,188.83
5. Step 5: Solve for x
   x = 334,739,074,188.83/666,019.98
6. Step 6: Final answer
   x = 502,596.14