Finding the Fourth Proportional to 180,221, 248,683.82 and 99,643.72

Step by Step Solution

1. Step 1: Write the proportion equation
   180,221 : 248,683.82 = 99,643.72 : x
2. Step 2: Convert to fraction form
   180,221/248,683.82 = 99,643.72/x
3. Step 3: Cross multiply
   180,221x = 248,683.82 × 99,643.72
4. Step 4: Simplify right side
   180,221x = 24,779,780,928.61
5. Step 5: Solve for x
   x = 24,779,780,928.61/180,221
6. Step 6: Final answer
   x = 137,496.63