Finding the Fourth Proportional to 99,493, 137,312.20 and 58,666.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99,493 : 137,312.20 = 58,666.34 : x
2. Step 2: Convert to fraction form
   99,493/137,312.20 = 58,666.34/x
3. Step 3: Cross multiply
   99,493x = 137,312.20 × 58,666.34
4. Step 4: Simplify right side
   99,493x = 8,055,604,211.35
5. Step 5: Solve for x
   x = 8,055,604,211.35/99,493
6. Step 6: Final answer
   x = 80,966.54