Finding the Third Proportional to 272,925,756 and 390,287,046

Step by Step Solution

1. Step 1: Write the proportion equation
   272,925,756 : 390,287,046 = 390,287,046 : x
2. Step 2: Convert to fraction form
   272,925,756/390,287,046 = 390,287,046/x
3. Step 3: Cross multiply
   272,925,756x = 390,287,046 × 390,287,046
4. Step 4: Simplify right side
   272,925,756x = 152,323,978,275,406,112
5. Step 5: Solve for x
   x = 152,323,978,275,406,112/272,925,756
6. Step 6: Final answer
   x = 558,115,073.15