Finding the Fourth Proportional to 139,104,420.72, 208,385,196.84 and 91,089,798

Step by Step Solution

1. Step 1: Write the proportion equation
   139,104,420.72 : 208,385,196.84 = 91,089,798 : x
2. Step 2: Convert to fraction form
   139,104,420.72/208,385,196.84 = 91,089,798/x
3. Step 3: Cross multiply
   139,104,420.72x = 208,385,196.84 × 91,089,798
4. Step 4: Simplify right side
   139,104,420.72x = 18,981,765,486,345,840
5. Step 5: Solve for x
   x = 18,981,765,486,345,840/139,104,420.72
6. Step 6: Final answer
   x = 136,456,953.62