Finding the Fourth Proportional to 686,460,690.18, 947,326,530.78 and 373,196,100.42

Step by Step Solution

1. Step 1: Write the proportion equation
   686,460,690.18 : 947,326,530.78 = 373,196,100.42 : x
2. Step 2: Convert to fraction form
   686,460,690.18/947,326,530.78 = 373,196,100.42/x
3. Step 3: Cross multiply
   686,460,690.18x = 947,326,530.78 × 373,196,100.42
4. Step 4: Simplify right side
   686,460,690.18x = 353,538,567,111,503,104
5. Step 5: Solve for x
   x = 353,538,567,111,503,104/686,460,690.18
6. Step 6: Final answer
   x = 515,016,478.25