Finding the Third Proportional to 61,921,926 and 86,616,837.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,921,926 : 86,616,837.50 = 86,616,837.50 : x
2. Step 2: Convert to fraction form
   61,921,926/86,616,837.50 = 86,616,837.50/x
3. Step 3: Cross multiply
   61,921,926x = 86,616,837.50 × 86,616,837.50
4. Step 4: Simplify right side
   61,921,926x = 7,502,476,538,501,406
5. Step 5: Solve for x
   x = 7,502,476,538,501,406/61,921,926
6. Step 6: Final answer
   x = 121,160,258.14