Finding the Fourth Proportional to 99,139, 136,749.45 and 58,824.16

Step by Step Solution

1. Step 1: Write the proportion equation
   99,139 : 136,749.45 = 58,824.16 : x
2. Step 2: Convert to fraction form
   99,139/136,749.45 = 58,824.16/x
3. Step 3: Cross multiply
   99,139x = 136,749.45 × 58,824.16
4. Step 4: Simplify right side
   99,139x = 8,044,171,526.71
5. Step 5: Solve for x
   x = 8,044,171,526.71/99,139
6. Step 6: Final answer
   x = 81,140.33