Finding the Fourth Proportional to 138,164.50, 190,667.01 and 78,548.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,164.50 : 190,667.01 = 78,548.50 : x
2. Step 2: Convert to fraction form
   138,164.50/190,667.01 = 78,548.50/x
3. Step 3: Cross multiply
   138,164.50x = 190,667.01 × 78,548.50
4. Step 4: Simplify right side
   138,164.50x = 14,976,607,634.99
5. Step 5: Solve for x
   x = 14,976,607,634.99/138,164.50
6. Step 6: Final answer
   x = 108,396.93