Finding the Fourth Proportional to 111,810.76, 154,297.98 and 63,421.90

Step by Step Solution

1. Step 1: Write the proportion equation
   111,810.76 : 154,297.98 = 63,421.90 : x
2. Step 2: Convert to fraction form
   111,810.76/154,297.98 = 63,421.90/x
3. Step 3: Cross multiply
   111,810.76x = 154,297.98 × 63,421.90
4. Step 4: Simplify right side
   111,810.76x = 9,785,871,057.76
5. Step 5: Solve for x
   x = 9,785,871,057.76/111,810.76
6. Step 6: Final answer
   x = 87,521.73