Finding the Fourth Proportional to 99,912.96, 149,140.56 and 87,301.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,912.96 : 149,140.56 = 87,301.50 : x
2. Step 2: Convert to fraction form
   99,912.96/149,140.56 = 87,301.50/x
3. Step 3: Cross multiply
   99,912.96x = 149,140.56 × 87,301.50
4. Step 4: Simplify right side
   99,912.96x = 13,020,194,598.84
5. Step 5: Solve for x
   x = 13,020,194,598.84/99,912.96
6. Step 6: Final answer
   x = 130,315.37