Finding the Fourth Proportional to 99,080.56, 148,529.94 and 42,885.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,080.56 : 148,529.94 = 42,885.28 : x
2. Step 2: Convert to fraction form
   99,080.56/148,529.94 = 42,885.28/x
3. Step 3: Cross multiply
   99,080.56x = 148,529.94 × 42,885.28
4. Step 4: Simplify right side
   99,080.56x = 6,369,748,065.28
5. Step 5: Solve for x
   x = 6,369,748,065.28/99,080.56
6. Step 6: Final answer
   x = 64,288.58