Finding the Fourth Proportional to 99,155,005.20, 138,960,496.35 and 99,155,005.20

Step by Step Solution

1. Step 1: Write the proportion equation
   99,155,005.20 : 138,960,496.35 = 99,155,005.20 : x
2. Step 2: Convert to fraction form
   99,155,005.20/138,960,496.35 = 99,155,005.20/x
3. Step 3: Cross multiply
   99,155,005.20x = 138,960,496.35 × 99,155,005.20
4. Step 4: Simplify right side
   99,155,005.20x = 13,778,628,738,178,830
5. Step 5: Solve for x
   x = 13,778,628,738,178,830/99,155,005.20
6. Step 6: Final answer
   x = 138,960,496.35