Finding the Third Proportional to 401,902,785 and 861,956,833.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,902,785 : 861,956,833.50 = 861,956,833.50 : x
2. Step 2: Convert to fraction form
   401,902,785/861,956,833.50 = 861,956,833.50/x
3. Step 3: Cross multiply
   401,902,785x = 861,956,833.50 × 861,956,833.50
4. Step 4: Simplify right side
   401,902,785x = 742,969,582,817,346,688
5. Step 5: Solve for x
   x = 742,969,582,817,346,688/401,902,785
6. Step 6: Final answer
   x = 1,848,630,093.01