Finding the Fourth Proportional to 128,999,216.10, 181,109,085.90 and 128,999,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   128,999,216.10 : 181,109,085.90 = 128,999,216.10 : x
2. Step 2: Convert to fraction form
   128,999,216.10/181,109,085.90 = 128,999,216.10/x
3. Step 3: Cross multiply
   128,999,216.10x = 181,109,085.90 × 128,999,216.10
4. Step 4: Simplify right side
   128,999,216.10x = 23,362,930,109,687,564
5. Step 5: Solve for x
   x = 23,362,930,109,687,564/128,999,216.10
6. Step 6: Final answer
   x = 181,109,085.90