Finding the Fourth Proportional to 115,215,300.10, 172,822,950.15 and 115,215,300.10

Step by Step Solution

1. Step 1: Write the proportion equation
   115,215,300.10 : 172,822,950.15 = 115,215,300.10 : x
2. Step 2: Convert to fraction form
   115,215,300.10/172,822,950.15 = 115,215,300.10/x
3. Step 3: Cross multiply
   115,215,300.10x = 172,822,950.15 × 115,215,300.10
4. Step 4: Simplify right side
   115,215,300.10x = 19,911,848,065,699,588
5. Step 5: Solve for x
   x = 19,911,848,065,699,588/115,215,300.10
6. Step 6: Final answer
   x = 172,822,950.15