Finding the Fourth Proportional to 1,088,940.72, 1,502,516.88 and 636,144.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088,940.72 : 1,502,516.88 = 636,144.24 : x
2. Step 2: Convert to fraction form
   1,088,940.72/1,502,516.88 = 636,144.24/x
3. Step 3: Cross multiply
   1,088,940.72x = 1,502,516.88 × 636,144.24
4. Step 4: Simplify right side
   1,088,940.72x = 955,817,458,714.77
5. Step 5: Solve for x
   x = 955,817,458,714.77/1,088,940.72
6. Step 6: Final answer
   x = 877,749.76