Finding the Fourth Proportional to 103,858,742.56, 142,574,542.20 and 89,148,871.20

Step by Step Solution

1. Step 1: Write the proportion equation
   103,858,742.56 : 142,574,542.20 = 89,148,871.20 : x
2. Step 2: Convert to fraction form
   103,858,742.56/142,574,542.20 = 89,148,871.20/x
3. Step 3: Cross multiply
   103,858,742.56x = 142,574,542.20 × 89,148,871.20
4. Step 4: Simplify right side
   103,858,742.56x = 12,710,359,498,986,764
5. Step 5: Solve for x
   x = 12,710,359,498,986,764/103,858,742.56
6. Step 6: Final answer
   x = 122,381,218.81