Finding the Fourth Proportional to 394,320,897.84, 544,126,320.72 and 218,105,100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   394,320,897.84 : 544,126,320.72 = 218,105,100.72 : x
2. Step 2: Convert to fraction form
   394,320,897.84/544,126,320.72 = 218,105,100.72/x
3. Step 3: Cross multiply
   394,320,897.84x = 544,126,320.72 × 218,105,100.72
4. Step 4: Simplify right side
   394,320,897.84x = 118,676,725,985,038,624
5. Step 5: Solve for x
   x = 118,676,725,985,038,624/394,320,897.84
6. Step 6: Final answer
   x = 300,964,840.15