Finding the Fourth Proportional to 172,402,581.47, 238,051,121.76 and 138,805,337.69

Step by Step Solution

1. Step 1: Write the proportion equation
   172,402,581.47 : 238,051,121.76 = 138,805,337.69 : x
2. Step 2: Convert to fraction form
   172,402,581.47/238,051,121.76 = 138,805,337.69/x
3. Step 3: Cross multiply
   172,402,581.47x = 238,051,121.76 × 138,805,337.69
4. Step 4: Simplify right side
   172,402,581.47x = 33,042,766,343,380,104
5. Step 5: Solve for x
   x = 33,042,766,343,380,104/172,402,581.47
6. Step 6: Final answer
   x = 191,660,507.99