Finding the Fourth Proportional to 103,111, 142,293.18 and 58,407.64

Step by Step Solution

1. Step 1: Write the proportion equation
   103,111 : 142,293.18 = 58,407.64 : x
2. Step 2: Convert to fraction form
   103,111/142,293.18 = 58,407.64/x
3. Step 3: Cross multiply
   103,111x = 142,293.18 × 58,407.64
4. Step 4: Simplify right side
   103,111x = 8,311,008,831.90
5. Step 5: Solve for x
   x = 8,311,008,831.90/103,111
6. Step 6: Final answer
   x = 80,602.54