Finding the Third Proportional to 369,385.50 and 549,154.50

Step by Step Solution

1. Step 1: Write the proportion equation
   369,385.50 : 549,154.50 = 549,154.50 : x
2. Step 2: Convert to fraction form
   369,385.50/549,154.50 = 549,154.50/x
3. Step 3: Cross multiply
   369,385.50x = 549,154.50 × 549,154.50
4. Step 4: Simplify right side
   369,385.50x = 301,570,664,870.25
5. Step 5: Solve for x
   x = 301,570,664,870.25/369,385.50
6. Step 6: Final answer
   x = 816,411.76