Finding the Fourth Proportional to 139,391,051.10, 192,556,354.86 and 111,697,726.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,391,051.10 : 192,556,354.86 = 111,697,726.20 : x
2. Step 2: Convert to fraction form
   139,391,051.10/192,556,354.86 = 111,697,726.20/x
3. Step 3: Cross multiply
   139,391,051.10x = 192,556,354.86 × 111,697,726.20
4. Step 4: Simplify right side
   139,391,051.10x = 21,508,107,003,222,320
5. Step 5: Solve for x
   x = 21,508,107,003,222,320/139,391,051.10
6. Step 6: Final answer
   x = 154,300,486.53