Finding the Fourth Proportional to 213,848,978.67, 320,908,406.43 and 91,027,099.98

Step by Step Solution

1. Step 1: Write the proportion equation
   213,848,978.67 : 320,908,406.43 = 91,027,099.98 : x
2. Step 2: Convert to fraction form
   213,848,978.67/320,908,406.43 = 91,027,099.98/x
3. Step 3: Cross multiply
   213,848,978.67x = 320,908,406.43 × 91,027,099.98
4. Step 4: Simplify right side
   213,848,978.67x = 29,211,361,596,526,088
5. Step 5: Solve for x
   x = 29,211,361,596,526,088/213,848,978.67
6. Step 6: Final answer
   x = 136,598,087.95