Finding the Fourth Proportional to 88,338.32, 121,946.69 and 58,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,338.32 : 121,946.69 = 58,139.50 : x
2. Step 2: Convert to fraction form
   88,338.32/121,946.69 = 58,139.50/x
3. Step 3: Cross multiply
   88,338.32x = 121,946.69 × 58,139.50
4. Step 4: Simplify right side
   88,338.32x = 7,089,919,583.26
5. Step 5: Solve for x
   x = 7,089,919,583.26/88,338.32
6. Step 6: Final answer
   x = 80,258.71