Finding the Third Proportional to 526,400 and 786,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   526,400 : 786,090.50 = 786,090.50 : x
2. Step 2: Convert to fraction form
   526,400/786,090.50 = 786,090.50/x
3. Step 3: Cross multiply
   526,400x = 786,090.50 × 786,090.50
4. Step 4: Simplify right side
   526,400x = 617,938,274,190.25
5. Step 5: Solve for x
   x = 617,938,274,190.25/526,400
6. Step 6: Final answer
   x = 1,173,894.90