Finding the Fourth Proportional to 151,389,279.54, 208,917,289.72 and 81,774,660.78

Step by Step Solution

1. Step 1: Write the proportion equation
   151,389,279.54 : 208,917,289.72 = 81,774,660.78 : x
2. Step 2: Convert to fraction form
   151,389,279.54/208,917,289.72 = 81,774,660.78/x
3. Step 3: Cross multiply
   151,389,279.54x = 208,917,289.72 × 81,774,660.78
4. Step 4: Simplify right side
   151,389,279.54x = 17,084,140,497,929,982
5. Step 5: Solve for x
   x = 17,084,140,497,929,982/151,389,279.54
6. Step 6: Final answer
   x = 112,849,077.23