Finding the Fourth Proportional to 499,062,397.34, 688,659,889.82 and 276,039,279.12

Step by Step Solution

1. Step 1: Write the proportion equation
   499,062,397.34 : 688,659,889.82 = 276,039,279.12 : x
2. Step 2: Convert to fraction form
   499,062,397.34/688,659,889.82 = 276,039,279.12/x
3. Step 3: Cross multiply
   499,062,397.34x = 688,659,889.82 × 276,039,279.12
4. Step 4: Simplify right side
   499,062,397.34x = 190,097,179,544,771,456
5. Step 5: Solve for x
   x = 190,097,179,544,771,456/499,062,397.34
6. Step 6: Final answer
   x = 380,908,641.00