Finding the Fourth Proportional to 152,533.48, 210,503.93 and 87,978.71

Step by Step Solution

1. Step 1: Write the proportion equation
   152,533.48 : 210,503.93 = 87,978.71 : x
2. Step 2: Convert to fraction form
   152,533.48/210,503.93 = 87,978.71/x
3. Step 3: Cross multiply
   152,533.48x = 210,503.93 × 87,978.71
4. Step 4: Simplify right side
   152,533.48x = 18,519,864,211.33
5. Step 5: Solve for x
   x = 18,519,864,211.33/152,533.48
6. Step 6: Final answer
   x = 121,415.08