Finding the Fourth Proportional to 152,448, 210,379.32 and 85,380

Step by Step Solution

1. Step 1: Write the proportion equation
   152,448 : 210,379.32 = 85,380 : x
2. Step 2: Convert to fraction form
   152,448/210,379.32 = 85,380/x
3. Step 3: Cross multiply
   152,448x = 210,379.32 × 85,380
4. Step 4: Simplify right side
   152,448x = 17,962,186,341.60
5. Step 5: Solve for x
   x = 17,962,186,341.60/152,448
6. Step 6: Final answer
   x = 117,825.00