Finding the Fourth Proportional to 91,697.15, 126,564.57 and 55,906.89

Step by Step Solution

1. Step 1: Write the proportion equation
   91,697.15 : 126,564.57 = 55,906.89 : x
2. Step 2: Convert to fraction form
   91,697.15/126,564.57 = 55,906.89/x
3. Step 3: Cross multiply
   91,697.15x = 126,564.57 × 55,906.89
4. Step 4: Simplify right side
   91,697.15x = 7,075,831,492.89
5. Step 5: Solve for x
   x = 7,075,831,492.89/91,697.15
6. Step 6: Final answer
   x = 77,165.23