Finding the Fourth Proportional to 258,373.59, 387,535.32 and 78,460.58

Step by Step Solution

1. Step 1: Write the proportion equation
   258,373.59 : 387,535.32 = 78,460.58 : x
2. Step 2: Convert to fraction form
   258,373.59/387,535.32 = 78,460.58/x
3. Step 3: Cross multiply
   258,373.59x = 387,535.32 × 78,460.58
4. Step 4: Simplify right side
   258,373.59x = 30,406,244,040.01
5. Step 5: Solve for x
   x = 30,406,244,040.01/258,373.59
6. Step 6: Final answer
   x = 117,683.25