Finding the Fourth Proportional to 90,110,514.24, 134,945,316.72 and 81,376,514.40

Step by Step Solution

1. Step 1: Write the proportion equation
   90,110,514.24 : 134,945,316.72 = 81,376,514.40 : x
2. Step 2: Convert to fraction form
   90,110,514.24/134,945,316.72 = 81,376,514.40/x
3. Step 3: Cross multiply
   90,110,514.24x = 134,945,316.72 × 81,376,514.40
4. Step 4: Simplify right side
   90,110,514.24x = 10,981,379,509,277,642
5. Step 5: Solve for x
   x = 10,981,379,509,277,642/90,110,514.24
6. Step 6: Final answer
   x = 121,865,684.62