Finding the Fourth Proportional to 99,643.02, 149,500.17 and 42,693

Step by Step Solution

1. Step 1: Write the proportion equation
   99,643.02 : 149,500.17 = 42,693 : x
2. Step 2: Convert to fraction form
   99,643.02/149,500.17 = 42,693/x
3. Step 3: Cross multiply
   99,643.02x = 149,500.17 × 42,693
4. Step 4: Simplify right side
   99,643.02x = 6,382,610,757.81
5. Step 5: Solve for x
   x = 6,382,610,757.81/99,643.02
6. Step 6: Final answer
   x = 64,054.77