Finding the Fourth Proportional to 48,410.36, 72,666.42 and 42,899

Step by Step Solution

1. Step 1: Write the proportion equation
   48,410.36 : 72,666.42 = 42,899 : x
2. Step 2: Convert to fraction form
   48,410.36/72,666.42 = 42,899/x
3. Step 3: Cross multiply
   48,410.36x = 72,666.42 × 42,899
4. Step 4: Simplify right side
   48,410.36x = 3,117,316,751.58
5. Step 5: Solve for x
   x = 3,117,316,751.58/48,410.36
6. Step 6: Final answer
   x = 64,393.59