Finding the Fourth Proportional to 99,066.60, 136,699.20 and 56,628

Step by Step Solution

1. Step 1: Write the proportion equation
   99,066.60 : 136,699.20 = 56,628 : x
2. Step 2: Convert to fraction form
   99,066.60/136,699.20 = 56,628/x
3. Step 3: Cross multiply
   99,066.60x = 136,699.20 × 56,628
4. Step 4: Simplify right side
   99,066.60x = 7,741,002,297.60
5. Step 5: Solve for x
   x = 7,741,002,297.60/99,066.60
6. Step 6: Final answer
   x = 78,139.38