Finding the Third Proportional to 86,291,784 and 185,390,640

Step by Step Solution

1. Step 1: Write the proportion equation
   86,291,784 : 185,390,640 = 185,390,640 : x
2. Step 2: Convert to fraction form
   86,291,784/185,390,640 = 185,390,640/x
3. Step 3: Cross multiply
   86,291,784x = 185,390,640 × 185,390,640
4. Step 4: Simplify right side
   86,291,784x = 34,369,689,399,609,600
5. Step 5: Solve for x
   x = 34,369,689,399,609,600/86,291,784
6. Step 6: Final answer
   x = 398,296,197.00