Finding the Fourth Proportional to 91,012,971.15, 136,519,456.73 and 91,012,971.15

Step by Step Solution

1. Step 1: Write the proportion equation
   91,012,971.15 : 136,519,456.73 = 91,012,971.15 : x
2. Step 2: Convert to fraction form
   91,012,971.15/136,519,456.73 = 91,012,971.15/x
3. Step 3: Cross multiply
   91,012,971.15x = 136,519,456.73 × 91,012,971.15
4. Step 4: Simplify right side
   91,012,971.15x = 12,425,041,376,326,098
5. Step 5: Solve for x
   x = 12,425,041,376,326,098/91,012,971.15
6. Step 6: Final answer
   x = 136,519,456.73