Finding the Fourth Proportional to 98,131.72, 135,439.50 and 57,843.16

Step by Step Solution

1. Step 1: Write the proportion equation
   98,131.72 : 135,439.50 = 57,843.16 : x
2. Step 2: Convert to fraction form
   98,131.72/135,439.50 = 57,843.16/x
3. Step 3: Cross multiply
   98,131.72x = 135,439.50 × 57,843.16
4. Step 4: Simplify right side
   98,131.72x = 7,834,248,668.82
5. Step 5: Solve for x
   x = 7,834,248,668.82/98,131.72
6. Step 6: Final answer
   x = 79,834.01