Finding the Fourth Proportional to 102,478.16, 152,698.52 and 91,298.95

Step by Step Solution

1. Step 1: Write the proportion equation
   102,478.16 : 152,698.52 = 91,298.95 : x
2. Step 2: Convert to fraction form
   102,478.16/152,698.52 = 91,298.95/x
3. Step 3: Cross multiply
   102,478.16x = 152,698.52 × 91,298.95
4. Step 4: Simplify right side
   102,478.16x = 13,941,214,086.06
5. Step 5: Solve for x
   x = 13,941,214,086.06/102,478.16
6. Step 6: Final answer
   x = 136,040.83