Finding the Fourth Proportional to 78,506.81, 117,731.72 and 42,994.52

Step by Step Solution

1. Step 1: Write the proportion equation
   78,506.81 : 117,731.72 = 42,994.52 : x
2. Step 2: Convert to fraction form
   78,506.81/117,731.72 = 42,994.52/x
3. Step 3: Cross multiply
   78,506.81x = 117,731.72 × 42,994.52
4. Step 4: Simplify right side
   78,506.81x = 5,061,817,986.54
5. Step 5: Solve for x
   x = 5,061,817,986.54/78,506.81
6. Step 6: Final answer
   x = 64,476.17