Finding the Fourth Proportional to 78,434.93, 117,655.15 and 25,128.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,434.93 : 117,655.15 = 25,128.53 : x
2. Step 2: Convert to fraction form
   78,434.93/117,655.15 = 25,128.53/x
3. Step 3: Cross multiply
   78,434.93x = 117,655.15 × 25,128.53
4. Step 4: Simplify right side
   78,434.93x = 2,956,500,409.56
5. Step 5: Solve for x
   x = 2,956,500,409.56/78,434.93
6. Step 6: Final answer
   x = 37,693.67