Finding the Fourth Proportional to 5,612.00, 8,419.50 and 4,999.91

Step by Step Solution

1. Step 1: Write the proportion equation
   5,612.00 : 8,419.50 = 4,999.91 : x
2. Step 2: Convert to fraction form
   5,612.00/8,419.50 = 4,999.91/x
3. Step 3: Cross multiply
   5,612.00x = 8,419.50 × 4,999.91
4. Step 4: Simplify right side
   5,612.00x = 42,096,700.15
5. Step 5: Solve for x
   x = 42,096,700.15/5,612.00
6. Step 6: Final answer
   x = 7,501.20