Finding the Fourth Proportional to 99,225, 136,891.50 and 56,760.84

Step by Step Solution

1. Step 1: Write the proportion equation
   99,225 : 136,891.50 = 56,760.84 : x
2. Step 2: Convert to fraction form
   99,225/136,891.50 = 56,760.84/x
3. Step 3: Cross multiply
   99,225x = 136,891.50 × 56,760.84
4. Step 4: Simplify right side
   99,225x = 7,770,076,528.86
5. Step 5: Solve for x
   x = 7,770,076,528.86/99,225
6. Step 6: Final answer
   x = 78,307.65