Finding the Fourth Proportional to 12,987,302.72, 17,922,498.80 and 7,186,328.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987,302.72 : 17,922,498.80 = 7,186,328.96 : x
2. Step 2: Convert to fraction form
   12,987,302.72/17,922,498.80 = 7,186,328.96/x
3. Step 3: Cross multiply
   12,987,302.72x = 17,922,498.80 × 7,186,328.96
4. Step 4: Simplify right side
   12,987,302.72x = 128,796,972,162,005.25
5. Step 5: Solve for x
   x = 128,796,972,162,005.25/12,987,302.72
6. Step 6: Final answer
   x = 9,917,145.61