Finding the Fourth Proportional to 69,320.32, 103,980.50 and 19,407.77

Step by Step Solution

1. Step 1: Write the proportion equation
   69,320.32 : 103,980.50 = 19,407.77 : x
2. Step 2: Convert to fraction form
   69,320.32/103,980.50 = 19,407.77/x
3. Step 3: Cross multiply
   69,320.32x = 103,980.50 × 19,407.77
4. Step 4: Simplify right side
   69,320.32x = 2,018,030,168.31
5. Step 5: Solve for x
   x = 2,018,030,168.31/69,320.32
6. Step 6: Final answer
   x = 29,111.67