Finding the Fourth Proportional to 91,085.60, 136,620.72 and 51,518.24

Step by Step Solution

1. Step 1: Write the proportion equation
   91,085.60 : 136,620.72 = 51,518.24 : x
2. Step 2: Convert to fraction form
   91,085.60/136,620.72 = 51,518.24/x
3. Step 3: Cross multiply
   91,085.60x = 136,620.72 × 51,518.24
4. Step 4: Simplify right side
   91,085.60x = 7,038,459,041.93
5. Step 5: Solve for x
   x = 7,038,459,041.93/91,085.60
6. Step 6: Final answer
   x = 77,273.02