Finding the Fourth Proportional to 100,081,364, 138,111,349.12 and 56,621,300

Step by Step Solution

1. Step 1: Write the proportion equation
   100,081,364 : 138,111,349.12 = 56,621,300 : x
2. Step 2: Convert to fraction form
   100,081,364/138,111,349.12 = 56,621,300/x
3. Step 3: Cross multiply
   100,081,364x = 138,111,349.12 × 56,621,300
4. Step 4: Simplify right side
   100,081,364x = 7,820,044,131,928,256
5. Step 5: Solve for x
   x = 7,820,044,131,928,256/100,081,364
6. Step 6: Final answer
   x = 78,136,866.04